Organic Keywords are all of the keywords that the domain Ranks in the top 50 search results on Google
How You Can Use It
When you have a list of a Competitor ‚s organic keywords, you are essentially looking at the blueprints for their entire Search Engine Optimization (SEO) strategy. You are free to copy, improve, or exploit anything that they are doing. There is absolutely no Shame in copying what your competitors do best and improving on it.
How You Can Use It
When the owner of the site know the sites that popular as well as your website, he can use this list to Cooper with these sites (exchange of experiences, link exchange) while the other site owner it would be beneficial. Because the sites are about the same popularity.