Views

You need Views if

•     You like the default front page view, but you find you want to sort it differently.
•     You like the default taxonomy/term view, but you find you want to sort it differently; for example, alphabetically.
•     You use /tracker, but you want to restrict it to posts of a certain type.
•     You like the idea of the 'article' module, but it doesn't display articles the way you like.
•     You want a way to display a block with the 5 most recent posts of some particular type.
•     You want to provide 'unread forum posts'.
•     You want a monthly archive similar to the typical Movable Type/Wordpress archives that displays a link to the in the form of "Month, YYYY (X)" where X is the number of posts that month, and displays them in a block. The links lead to a simple list of posts for that month.
• Views can do a lot more than that, but those are some of the obvious uses of Views.

Views for Drupal 8

Views is in Drupal 8 Core!
Recommended versions of Views!

For new installs of Drupal 6, we recommend the 6.x-3.x branch. We have not changed the recommended version you see below, because there is an upgrade bug in 6.x-2.x that causes upgraded views to break. We don't want anyone getting a surprise breakage of their site.

The 6.x-2.x branch of Views is in critical/security maintenance mode only. If we can fix the upgrade issue, that will absolutely be fixed and the branch will officially be deprecated at that point. Support efforts will be concentrated on the 3.x branch.