By using a collaborative filtering method, we can identify keywords that are closely related to "used books". Of all the web sites that target "used books", these are the most commonly targeted keywords by this same group of web sites, sorted by the highest number of web site matches.
The root keyword phrase "used books" also exists in these keywords. Drill down to see who is targeting long-tail variations off of "used books".
The keyword phrase "used books" can be broken down into these keyword pieces. Find out who is targeted short-tail variations off of "used books".
