1. A method for retrieving content related to a feed item of an online social network, the method comprising: receiving a feed item to be displayed in a feed associated with a first user of an online social network, the feed capable of being displayed on a display device; identifying, by a computing device, in the received feed item, a first tagged keyword comprising a first tag and a first keyword; identifying one or more data sources based on the first tag; retrieving, from the one or more data sources, a plurality of content records related to the first keyword; selecting a content record of the plurality of content records; and automatically generating an information update associated with the feed item, the information update including content information of the selected content record, the information update capable of being displayed in association with the feed.