Aggregation describes the collection of information assets in the first phase of a Content Management project.

Gathering information from multiple web sites is typically done via RSS or RDF feeds (news feeds or data feeds). Aggregation lets web sites remix the information from multiple web sites, for example by republishing all the news related to a particular keyword.

An aggregator or news aggregator is client software that uses a web feed to retrieve syndicated web content such as weblogs, podcasts, vlogs, and mainstream mass media websites, or in the case of a search aggregator, a customized set of search results.

Aggregators reduce the time and effort needed to regularly check websites for updates, creating a unique information space or"personal newspaper."