A format for storing online information in a way that makes that information readable by lots of different kinds of software. Many blogs and web sites feature RSS feeds: a constantly updated version of the site's latest content, in a form that can be read by a newsreader or aggregator. RSS is one of the most important technologies of Web 2.0.

Syndication offers benefits for both the publisher and subscriber. Publishers can extend the reach and value of their content by displaying it in multiple venues. Subscribing sites can elevate the level of content they offer visitors by drawing on outside resources.

However, syndication presents content management challenges for both publisher and subscribers. Publishers must guarantee a steady stream of consistently-structured content, according to some sort of agreed-upon format. Subscribers must be able to import and absorb this information within their own content management and presentation systems.

Various third party services have emerged to help both publishers and subscribers, including syndication aggregators and technology vendors, some of whom have licensed their solutions to CM vendors.