This is the first supported release of the new Drupal 11 major version, and it is ready for use on production sites! Learn more about Drupal 11 and the Drupal core release cycles.
Drupal 11.0.0 follows shortly after the Drupal 10.3.0 release. Drupal 10.3 has most of the new functionality that Drupal 11 does, but retains backwards compatibility layers added through Drupal 10.3.0's release. Sites must update to Drupal 10.3 before updating to Drupal 11.
If you are starting a new Drupal project, you have a choice between Drupal 10.3 and 11, and generally should choose Drupal 11 where possible for forward compatibility with future releases.
Regardless of which version you choose now, new features will only be added to Drupal 11 minor releases. Plan to adopt Drupal 11 so that you can easily update to Drupal 11.1 and later.