The scientists that research recovery and regeneration of professional athletes support the usage of massage guns. Especially those that claim that sports massage is the best recovery program after taxing training day.
In its essence massage is applying pressure to soft tissue. The massage gun imitates the classic massage by applying pressure, it is just the mechanics of it that differ.
The major benefit of the massage gun is that you can use it by yourself in the comfort of your home. Regular massage will help with muscle regeneration and improves your flexibility and mobility.