Monitor search performance.

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Detect indexing issues and potential penalties for unwanted content.
Obtain data about site traffic and user behavior.

Google Analytics
Google Analytics (now known as GA4, or Google france mobile database Analytics 4 ) is another very powerful tool that allows you to analyze user behavior on your site. If you notice very high bounce rates or users leaving quickly, this may be a sign that your content is not offering value or is being perceived as spam. The main insights that this tool can offer you are:

Analyze visitor behavior (duration of visits, most viewed pages, etc.).
Detect browsing patterns that may indicate irrelevant or problematic content.
Monitor conversions and bounce rates.

Copyscape
Making its debut on this list is a tool that is frequently used by content creators to verify that their work has not been plagiarized, or if there is a lot of similarity with other sites. Copyscape is a tool that will allow you to detect duplicate content, which is penalized by Google. Its main functions are usually the detection of plagiarism in other people's and your own texts, as well as ensuring that the content is completely original.


Ahrefs and SEMrush
Ahrefs and SEMrush are specialized SEO tools that will not only help you improve your site's ranking, but also allow you to detect broken or low-quality links, which could be considered spam by Google. They are very useful plugins that, although they are not at all cheap, can offer you a wide variety of features that will make SEO work much easier.