StumbleUpon was a discovery and advertisement social network.

StumbleUpon allowed users to discover and rate Web pages, images, and videos. The users could personalize the content they shared with their tastes and interests using social networking and advertising principles.

StumbleUpon was free to use platform. Users were required to join with their personal details. Upon sign-up, users had access to everything they ever wanted to see. The site would seek all the information and give personalized results to users.

The StumbleVideo site allowed users without a toolbar to stumble through all the videos that toolbar users have submitted and rate them. Users could stumble within sites such as YouTube, and Wikipedia using StumbleThru service. Users could take advantage of StumbleUpon’s URL shortening service that was used to link to Twitter and Facebook statuses and updates.

Use the StumbleUpon Toolbar to access StumbleUpon features on whatever page you land on.

Stumble specific interests by clicking on the drop-down menu in the upper-right corner.