In the realm of Internet marketing, autosurfs are traffic exchanges that automatically rotate advertised websites in one's web browser. Therefore, they are capable of bringing a large amount of traffic to the advertised websites. Members earn credits for each site that they view, which can then be spent to advertise members' sites by adding them to the autosurf rotation. Sites may additionally be added by external advertisers who pay the autosurf operators.
Autosurfing is an evolved form of traffic exchanging, based on the manual surf traffic exchange concept. In 2001, Autohits.dk was the first ever autosurf traffic exchange to use a PHP script that eliminated the need for viewers to manually click a link or image to advance to the next page in the rotation. Traffic exchanges are based on a simple concept: members of a traffic exchange view each others' sites in order to earn credits. Those credits are applied for views in the rotation. The purpose of autosurf traffic exchanges is to increase website traffic.