By using a collaborative filtering method, we can identify keywords that are closely related to "check in". Of all the web sites that target "check in", 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 "check in" also exists in these keywords. Drill down to see who is targeting long-tail variations off of "check in".
The keyword phrase "check in" can be broken down into these keyword pieces. Find out who is targeted short-tail variations off of "check in".