With Google Trends, you can compare the world's interest in your favorite topics. Enter up to five topics and see how often they've been searched on Google over time. Google Trends also shows how frequently your topics have appeared in Google News stories, and in which geographic regions people have searched for them most.

Collection of information about a web site, including statistics on web site traffic, usage, popularity, related sites, contact information, mailing address and more

Internet ratings service with visitor profiles for millions of websites and services.