Technical SEO Mistakes A comprehensive website audit is an ongoing and complex process that includes dozens of security checks and diverse knowledge. This once again confirms that creating and maintaining a dynamic and thriving website is a difficult task for beginners, and sometimes even seasoned professionals.

There’s no such thing as a perfect website that can’t be improved. Hundreds of issues can arise. Which one should you focus on first?

We decided to give you an Technical SEO Mistakes answer and

conducted research on the frequency of SEO errors appearing on websites. We gathered anonymous data on 100,000 websites and 450 million buy phone number list pages using the SEMrush Site Audit tool  to determine the most common technical and SEO errors and on-site issues.

We conducted the same research last year , but only provided information on the 11 most common checks. This year, we decided not to focus only on common errors, but to give you as much information as possible. So, below you will see the statistics on 40 checks, divided into three main groups:

Crawlability Technical SEO On-page SEO

We’ve also tweaked our methodology a bit and added a new dimension: issue severity. Each issue has a severity level ranging from 5 to 1, with 5 being the highest. The severity level reflects not only the influence of a particular error on rankings, but also its impact on overall site performance and user experience. We added it because some errors, although appearing very rarely on sites, can have a high severity level, and we don’t want them to be overlooked.

This data on both frequency and severity will give cost of app development in the world you full insight into specific errors and allow you to assess risks and determine during the audit whether your efforts are worthwhile.

And now, let’s get straight to the point!

Although SEMrush Site Audit has over 60 checks in itsarsenal, we chose to track 40 of them and excluded checks related to HTTPS and hreflang implementation. You can find information on the frequency of issues related to these topics in our recent research:

The Most Common Hreflang Mistakes [Infographic]

SEMrush Study: The 11 Most Common On-Site SEO Problems

But we’ve got much more in store for you! Last year, our infographic was accompanied by a huge post with descriptions of the analyzed errors. But they belgium numbers were brief, as it’s difficult to compress data on 19 important errors into a single blog post (their impact on ranking and user experience, as well as explanations for how to resolve them). So this year, we’re releasing a comprehensive PDF guide: The Ultimate SEO Audit Checklist, with information on the “nature” of each error, its impact on site health, and tips on how to resolve them.