Overwatch is a both simple and complicate game. It is easy to start playing without applying many strategies or thinking too hard about your characters. It's fine to jump in and start blasting when you first get access. However, building and maintaining a positive win rate is not so simple. If you're struggling to improve your win rates, here some critical tactics are showed by a professional overwatch power leveling seller.
Tank and Support
Tracer to start
for the floor
Your Ears Peeled!
If you want to learn the detail skills, you can check this resource: