How to Perform a Complete SEO Audit (in 15 Steps)

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What Is an SEO Audit?

An SEO audit is the process of evaluating how well your website is optimized for search engines. It identifies errors that can prevent your site from ranking well and opportunities that can help you rank better.

An SEO audit usually covers areas like:

  • Indexing and crawlability 
  • User experience
  • Site architecture
  • Competitor benchmarking
  • Keyword research
  • On-page SEO
  • Backlink profile

It is basically an overall “health check” for a website.

An effective SEO website audit is based on hard data about the technical health, traffic, and backlink profile of your website (and the websites of your competitors).

The two most important tools that will help you with that are: 

  • Google Search Console: a set of dashboards and reports by Google that allows you to monitor and troubleshoot any issues related to your website’s presence on Google
  • Semrush: an all-in-one SEO toolset that provides a comprehensive look at your site’s performance and helps you improve your website in all the crucial SEO areas

We’ll take a closer look at how to do an SEO audit using these tools in the next steps.

Let’s dive in. Here’s how to perform an SEO audit in 15 steps:

1. Check for Indexing Issues

Pages that are not indexed are not in Google’s database. Google can’t rank them.

To see whether your pages have been indexed, check for issues directly in Google Search Console.

Head to the “Pages” report under the “Index” section in the left menu. Here, you can see a graph of all pages based on their indexing status. 

indexed vs nonindexed pages

Underneath, you’ll see a list of reasons why pages haven’t been indexed.

Go through all the listed reasons one by one. Inspect the pages that fall within these reasons.

why are pages not indexed

Remember that not all pages have to be indexed—only the ones you want to rank in search results. So it’s completely normal to have some URLs that are not indexed.

Here are some examples of URLs that don’t have to be indexed:

  • Pages with redirects
  • Admin pages
  • Alternate pages with canonical tags
  • Feed pages

If you find a page that should be indexed but isn’t, fix the issue by following Google’s guidelines. Once done, hit the “Validate Fix” button.

validate fix indexation

Alternatively, you can just grab a specific URL and enter it into the top search bar in the Google Search Console dashboard.

page indexing

You’ll see the URL’s status. You can also request that Google index the URL by clicking the “Request Indexing” link.

google search console url inspection

If you’ve changed the page substantially, you can request indexing again. Even if the page is already indexed.

url inspection indexed pages

If you want to learn more about Google indexing, read our guide on this topic.

2. Check for Duplicate Versions of Your Site

It is essential to ensure that Google is indexing only one version of your site. 

Your site could sit on various versions of a URL (depending on whether there’s WWW in the domain and whether your site uses HTTPS).

To a search engine, these are all different versions of the site: 

  • http://www.yoursite.com
  • http://yoursite.com
  • https://www.yoursite.com
  • https://yoursite.com

If your website runs on more than one of these URL versions, it can cause many issues with crawling, indexing, and ranking. Especially because Google will take them as duplicates.

Also, having multiple versions of your site can dilute PageRank, which can also have a negative impact on your rankings. 

You can check this very simply:

Just enter all the versions of your site into a web browser. 

You should be automatically redirected to the preferred version. For example, if your preferred URL version is https://yoursite.com, you should be redirected to it if you enter any other version into your browser.

redirect to preferred site version

If you can access your site through various versions, use a 301 redirect for the other versions. Read our guide to SEO redirects to learn more about this topic. 

3. Run a Site Crawl

A good SEO audit is crawl-based. 

That means you should be able to simulate the way Google crawls your pages. And see all issues related to those pages the way Google might see them.

To do that, you’ll need an SEO auditing tool like Semrush’s Site Audit. First, you’ll create a project and set up the audit. 

site audit settings

There are several configurations in this step. You can check out this guide to help you go through it.

Once you’re all set, click the “Start Site Audit” button. 

Based on the number of crawled pages, it may take a little while until it is finished. Once done, you’ll get an email letting you know.

The audit dashboard looks like this:

site audit dashboard

The main metric you should pay attention to is the Site Health score. It is an overall indicator of the SEO health of your website based on the number and seriousness of issues found. 

site health score

Next, you’ll see the issues divided into three categories:

  1. Errors
  2. Warnings
  3. Notices

These will help you prioritize your fixes. 

site audit errors and warnings

You’ll also find some “Thematic Reports” that will help you take a closer look at various aspects of technical SEO:

site audit thematic report

We’ll dive deeper into some of these in the following steps.

However, the main purpose of the Site Audit tool is to help you see all the issues in one place. Click on the “Issues” tab next to the “Overview” tab:

site audit issues report

Here, you’ll find a full list of all the issues. Go through them one by one and start fixing them. 

Click each issue to reveal the list of all affected URLs.

site audit affected urls

Here are some examples of issues you may encounter:

  • Crawlability issues: e.g., some pages returned 5xx status code
  • Redirect issues: e.g., some of your redirects are looped
  • Sitemap issues: e.g., some incorrect pages were found in your sitemap
  • Issues with HTTPS: e.g., HTTPS pages link to HTTP pages
  • Internal links issues: e.g., you have broken (non-functional) internal links
  • On-page SEO issues: e.g., you don’t have title tags for some pages
  • Markup issues: e.g., some structured data markup doesn’t comply to Google’s guidelines
  • Performance issues: e.g., some pages load slowly

Some of these issues are quite easy to fix. Some may require a more complex solution.

If you’re not sure where to start, the tool offers an explanation and a short “how to” guide for each issue. Just click the “Why and how to fix it” link next to the issue name. 

how to fix sitemap

Side note

You don’t have to wait until you do your next SEO audit to use Site Audit. Run the Site Audit tool on a regular basis to track your progress and discover new issues that may have appeared since the last crawl.

4. Check for Manual Actions

If your site violates Google’s spam policies, it may receive a manual action from Google.

In practice, a manual action means that your site’s rankings will drop until Google revokes the action. This action can either be at the page level or sitewide.

Some reasons why you may have received a manual action include the following:

  • Keyword stuffing
  • Unnatural links (both to and from your site)
  • Various kinds of spam
  • Thin content with little or no added value

You can check if you’ve received a manual action in Google Search Console. Down the left-hand side menu, you will see a “Security and Manual Actions” section, and within this, a “Manual actions” link.

Click it, and you’ll land on a page where you’ll see the status. 

Hopefully, you see a green tick that shows that no issues are detected.

google search console manual actions

If there’s a manual action against your website, you need to fix the issues and make a reconsideration request. Check Google’s Manual Actions guide for more details.

For example, if you’ve received a manual action as a result of buying backlinks (“Unnatural links to your site”), you’ll need to get rid of those backlinks either by contacting the webmasters or disavowing them. 

Need more details on this? We also have a helpful guide on navigating and avoiding manual penalties.

5. Check for Mobile-Friendliness Issues

We live in a mobile-first world, and if your site isn’t mobile-friendly, there’s a good chance that you aren’t putting your user experience first.

Mobile-friendliness is one of the main Page Experience signals for Google. In fact, it has been a ranking factor since 2015. Which means it can directly influence your ability to rank in search results.

You can check for any issues in the Mobile Usability report in Google Search Console. Just click “Mobile Usability” under the “Experience” section in the left menu.

Here, you’ll find a quick overview of the usability of your pages in time: 

google search console mobile usability

The report will also list all the issues related to mobile-friendliness.

It may look something like this:

mobile usability issues

You can expand each issue to see all the affected pages.

Follow the instructions in Google’s Search Console Help center to fix the issues. 

Once fixed, you can validate the fix to make sure Google rechecks the page and confirms that the issue is resolved.

fix issues with mobile usability

Here are some more tips on how to make your site mobile-friendly.

6. Analyze Your Site’s Speed

It is more important than ever that your site loads quickly. Page speed has also been a ranking factor for a long time. So it can help you rank higher on Google.

What’s more, it is an important user experience factor. Looking at user behaviors, data shows that the slower a page loads, the higher the chance of a user leaving the website. 

website speed importance
Source: Think With Google

To check the speed of your website, head to the “Site Performance” report from your Site Audit dashboard.

site audit performance

Here, you’ll see a list of all the performance issues with detailed tips on how to fix them.

site audit performance issues

7. Analyze Your Core Web Vitals

In 2020, Google introduced three new metrics related to page speed and user experience:

  • Largest Contentful Paint (LCP): measures how long it takes to load the largest piece of the page
  • First Input Delay (FID): measures the delay between the user’s first interaction with a page and the browser’s response to it
  • Cumulative Layout Shift (CLS): measures how much the layout of the page shifts for the user, as well as visual stability

Together, they’re called Core Web Vitals.

core web vitals

Since Core Web Vitals are a ranking factor, checking these metrics for your key pages should definitely be part of your SEO website audit.

Google Search Console comes to the rescue here again.

Head to the “Core Web Vitals” report under the “Experience” section in the left menu.

Here, you’ll see both “Desktop” and “Mobile” reports listing all the issues and the affected pages.

core web vitals in google search console

These reports will give you detailed insights into any Core Web Vitals issues your site may have. 

The tool distinguishes between pages that have severe issues (“poor URLs”) and those that just need some improvement. 

Go through the issues and follow the instructions on how to fix them. 

There’s also a dedicated Core Web Vitals report in Semrush’s Site Audit: 

core web vitals report

You can see all the metrics on the level of a single page and keep track of your progress over time. You can also manually select 10 URLs to check for Core Web Vitals issues.

Note: The First Input Delay (FID) is based on real user events in Google Search Console. That’s why it is replaced by a similar metric—Total Blocking Time (TBT)—in Semrush. 

site audit edit urls

Internal links are a crucial part of SEO for three reasons:

  1. They help search engines crawl your website
  2. They help users navigate your website
  3. They help you to direct link equity (also called “authority” or “link juice”) to the most important pages

In Semrush’s Site Audit, there’s a report dedicated to internal linking issues. It’s “Internal Linking” under the list of “Thematic Reports”:

site audit internal linking report

After you open the report, you’ll get a list of issues related to internal links and tips on how to fix them.

site audit internal linking issues

The report will also give you a useful overview of your pages based on Internal LinkRank (ILR)—a metric that measures how well interlinked a page is.

internal link rank

Going through each category will help you identify two types of pages:

  1. Important pages that do not get enough internal links (so that you can point more internal links to them)
  2. Pages with good ILR (so that you may use them to distribute link equity to other pages)

10. Check Your Organic Traffic

Organic traffic means visitors that land on your website after clicking on unpaid (“organic”) search results.

This is one of the most important indicators of the success of your website when it comes to SEO. 

To see your organic traffic, go to Google Search Console and open the “Search results” report under the “Performance” section in the menu. 

performance search results in google search console

There are four main metrics in the report. The metric that will be most interesting in this context is “Total clicks”—how many times a user clicked through to your site during the specified time frame.

google search console performance clicks

There are numerous ways to configure the report to see the data you need. For example, you can view results by queries, pages, devices, and countries:

google search console report categories

These reports will give you a lot of useful information about the organic traffic to your website. And help you establish benchmarks and track your progress. 

Tip: Read Google’s guide to the Search Performance report to learn more about the report and its functions.

11. Benchmark Against Your Competitors

A good SEO audit should also help you see where you stand when compared to your competitors.

A great way to start is to use a tool like Semrush’s Domain Overview

First, enter your domain:

domain overview tool

Then, head to the “Compare domains” tab. Here, you can select up to four competitor domains. If you’re not sure who your main competitors are, pick the domains the tool suggests.

compare competitors with domain overview

The tool will give you a solid comparison of the key metrics of the selected domains. These will give you a good overview of where you’re lagging behind or excelling.

To get the best overview, focus on these metrics:

  • Authority Score: shows the overall quality of domain on a scale from 1 to 100 (based on its backlinks, search traffic, and other factors)
  • Organic Traffic: shows how much organic traffic the domain receives
  • Organic Keywords: shows how many keywords the domain ranks for
  • Referring Domains: shows how many different domains link to the analyzed domain (This provides a better picture for comparison than the overall number of backlinks.)
domain overview compare competitors metrics

In the next two steps, we’ll take a look at how to get the most out of your competitors’ keywords and backlink data. 

12. Find Keywords You’re Missing Out On

An SEO audit is a great opportunity to look at what keywords your competitors target and see whether you’re missing out on relevant keyword opportunities. 

Open the Keyword Gap tool and enter your domain and the domains of your competitors.

keyword gap tool

After you hit “Compare,” the tool will compare the sets of keywords the analyzed domains are ranking for.

Scroll down to the list of keywords and take a good look at the “Missing” and “Weak” tabs:

  • Missing: keywords the analyzed competitors rank for (but you don’t)
  • Weak: keywords the analyzed competitors rank for higher than you
keyword gap tool missing and weak domains

The list will likely reveal some hidden keyword opportunities you may not have considered. 

Similarly to using Keyword Gap tool to find great keyword opportunities, you can use the Backlink Gap tool to find backlink opportunities.

Just enter your domain and the domains of up to four competitors:

backling gap tool

The tool will show a list of domains that link to all the analyzed competitors but not to you: 

best backlinks

These are domains that are much more likely to link to your website since they’re already linking to similar websites (your competitors). 

Click on the arrow next to the number indicating the number of backlinks from a certain domain. This expands the view to show specific pages that link to your competitors. As well as the anchor text and target URLs.

inspect backlink gap

Now, you can try to replicate these backlinks. Select the ones that are relevant to your website and click the “Start outreach” button in the top-right corner. 

start outreach with backlink gap tool

This will send the selected prospects to the Link Building tool, where you can set up a new project for your domain. 

The tool will help you:

  • Find backlink prospects from various sources
  • Reach out to the domain owners and ask them for backlinks
  • Keep track of the progress of your outreach campaigns
link building tool overview

To learn more, check out this guide on how to start a link building campaign with Link Building tool. 

14. Audit and Improve Your Top Pages

A general site crawl will help you find technical issues across your website

However, it’s also good to take a closer look at specific pages (especially the ones that are most important for you), analyze their performance, and find ways to improve them.

A handy tool called On Page SEO Checker will help you with that.

Set up the project and fill in your pages and their target keywords. You can let the tool find the pages and keywords automatically or fill them in manually.

onpage seo checker

You don’t need to check all your pages. Instead, focus on the ones that:

  • Bring the most conversions
  • Target the keywords that are most important for your business

The tool will compare your data with the top-ranking competitors and provide actionable tips and recommendations to improve your rankings in various on-page SEO audit areas:

onpage seo checker overview

To check the ideas for a specific page, go to the “Optimization Ideas” tab and click the green button with the number of ideas next to the page’s URL:

onpage seo checker optimization ideas

You’ll get a detailed list of all the suggestions (with tips and difficulty levels):

onpage seo checker idea tips

If you want to go deeper and learn more about how to conduct a general content audit, read our guide to content audits

15. Monitor Your Rankings

Using a rank tracking tool is one of the best ways to always keep track of your website’s performance in organic search results. 

These tools allow you to:

  • Keep track of your website’s rankings for keywords you care about
  • Check how the search engine results page (SERP) rankings change in various geographical locations
  • Compare your rankings with those of your competitors
  • Get alerts for any important changes in the rankings of your website

To set up rank tracking, open Semrush’s Position Tracking tool and enter your domain.

The basic settings will have you set up the search engine, device, and location parameters for your tracking. 

position tracking setup

Then, you’ll be prompted to enter the keywords you want to track. You can enter them manually, import them from an external file, or use the suggestions Semrush offers.

position tracking setup keywords

With your newly created position tracking project, you can monitor all the movements in your rankings in one place.

position tracking widget

To set up alerts, click the little bell icon in the top right corner.

Here, you can set up various triggers (e.g., a keyword entering the top 10 results) and get instant notifications about these changes to your email. 

position tracking alerts

Next Steps

An SEO audit is a great start on your way to SEO success. What’s next?

Want to dive deeper into the world of technical SEO? Check out our technical SEO course to gain invaluable insights.

Or just create a Semrush account and run your first SEO audit for free with the Site Audit tool.

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