A rating in SharePoint Server 2010 is an assessment or classification of content on a scale according to how well the content meets specific criteria.
A rating in SharePoint Server 2010 is an assessment or classification of content on a scale according to how well the content meets specific criteria. Ratings show an average score that can range from 1 to 100, and a popup window that displays additional information about the score. Users can rate items in a SharePoint list, document library, and individual Web pages. Users do not require write permission on an item in order to rate it.
Each rating consists of a user identity, an item URL, and the rating itself. A rating also contains the date and time when the rating was applied. Ratings are stored in a table in the same database that stores social tags.
By default, ratings support is enabled across a farm. However, to use ratings in a specific site collection, ratings must first be enabled for that site collection. Ratings can be enabled on any site template if support for ratings is enabled on the farm. By default, the Ratings feature is on for the Publishing Portal site template.