Amazon CloudSearch is a fully managed service in the cloud that makes it easy to set up, manage, and scale a search solution. Amazon CloudSearch can search large collections of data such as web pages, document files, forum posts, or product information. CloudSearch makes it possible to search large collections of mostly textual data items called documents to quickly find the best matching results. Search requests are usually a few words of unstructured text. The returned results are ranked with the best matching, or most relevant, items listed first.