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New features are released to a select group of users before being released to the general public. New features can be added to a new version of an app that is not available to all users. Engineers are able to test new features and find bugs before they are released. The new features will be available to users in the next few weeks, but not all of the features are available to everyone. The next step is to make sure the new features don't have to be released before the general release is complete.