Shoulder mobility is important both from a strengthening and stretching perspective. We need strength to help support the joint and decrease risk of injury. We also need flexibility to maintain a pain-free range of motion.
Here is a video where i demonstrate a couple of moves that can vastly improve your shoulder mobility and improve your overall performance.
I also recommend these exercises for cricketers , tennis players etc who use their shoulders to generate power.
Check out the video, like it and share it to your friends who would find it useful.