I'm surprised to see a freebie on this but take advantage of it if you are doing any SEO work. This is part of a tool set so set your expectations that it is for backlink research and auditing and it does an excellent job. For sites you have access to, you can connect Google Analytics and Google Search Console to gather additional data. I also like the find domain competitors and topic competitors feature. You might think you know your competitors but search engines have a mind of their own.