Team Composition
Team composition isn't everything in the game but it helps you win because if you have a team of all dps then your chances of winning are down. Usually depending on the team you want 2 healers but if you have a team where half of them have self healing then you can have 1 healer but focus the people without self healing. You usually need at least one tank but really the only tanks who can reliably so tank are Orisa, Winston and Reinhardt because they have a shield to protect their team but you can still mix other tanks in there. Some tanks like Roadhog even though he is in the tank section he can count as a dps so keep that in mind. You also need a good dps so you can actually kill the team but don't overdue otherwise they won't stay alive so make sure you have the best dps for the team.