When you visit a webpage, most of the images, videos and other page elements come from the address you type into your browser. But other parts of the site like ads and trackers load from other websites. We call these things 3rd-party elements (or 3pes, for short).

Thanks to Ghostery users who opt into GhostRank, we can build reports that show how frequently these 3pes appear around the Web.

In the table below, you'll find the top 100 3pes, ranked by how many more times an element appears on the Web over the element in the table's last place. The ↑, ↓ and = symbols show change in rank from the previous measurement.

3pes come in several types:

• Advertiser (AD): a 3pe that delivers advertisements
• Analytics (AN): a 3pe that provides research/analytics for website publishers
• Tracker (T): a 3pe that exists only to track user behavior
• Widget (W): 3pes that provide some kind of page function (comment forms, "Like" buttons, ...)
• Privacy (P): 3pes that disclose data practices involved in delivering an ad