Webring
Webring is a group of websites, generally using a common URL to list themselves together in a circular structure. All the sites on a ring will be simlar in nature and have a common navigation bar that contains links to the previous and next slide. Joining a webring can help you generate more traffic to your website and is considered to be a search engine optimization technique. One of the most popular webrings is WebRing, which is quite similar to a search engine.