It seems Facebook is following divide and rule policy, the release of it's new Groups app is conveying the message. Already Facebook CEO Mark Zuckerberg released one video message regarding its strategy behind isolating messenger app from the main Facebook app. Now it's turn for Groups app, users can access and enjoy ease access with it's standalone groups app.

According to the stats more than 700 million users use Facebook groups feature to stay in touch with family, collaborate on projects, plan trips and offer support to friends. With the newly introduced Facebook Groups app that helps people share faster and more easily with all the groups in their life.
According to the statement given by Facebook they built this app with the people who use Groups the most in mind, like: