Google Sites is an online web content management tool that can help you to quickly create a website. It can be compared to other tools like Drupal, TYPO3, or Joomla!, but with added collaborative functionality.
The design of Google Sites is similar to a wiki. Several users can collaborate to build a website. One possible use of Google Sites is to aggregate data from other Google Apps, like Google Docs, Google Calendar, video, or simply text.
To facilitate the creation of a new site, Google Sites provides a large selection of templates both for whole sites and individual pages.
A common use for Google Sites is the creation of a website dedicated to a project team.