Drupal's blog module allows all registered users to maintain a personal weblog on site. Blogs are easily- and frequently-updated websites usually written in an informal and conversational style. They are ordered reverse-chronologically (that is, the most recent entry is at the top) and have archives of past entries. Each individual entry has a permanent—that is to say, stable—URL linking directly to that item. Blogs typically have comments for each entry so that readers can participate in the discussion, and they usually have RSS feed to be syndicated elsewhere or read in an desktop aggregator. Each entry usually contains one idea, with a link to the source of the original item being discussed. Blogs can be (and are) written about any subject, from daily personal life to technology to politics to knitting to sports to a company's products.
From a more practical standpoint, blogs can be seen as a means of personal knowledge publishing, a place for researchers or enthusiasts to build and share knowledge about their interests. Or in project oriented sites, as a workspace for project members to post ideas for commenting by others in a group.