Main strengths: Hard to kill, Massive self-sustain, Great pick potential, Can 1 shot most champions, Playmaker, Good damage output.
Main weaknesses: Hook accuracy dependent, Low poke from distance, Can be killed fast if focused, Very low mobility.
Favourtable maps and modes: Best on maps with choke points where he can pick enemies one by one.
Defend / Attack specifics: As defender you need to have at least one more tank to provide a beefy frontline. As attacker your main job is to pick the squishies and give advantage to your team with that.
Synergises with: Ana, Reinhardt, Mercy, Zarya
Countered by: Ana, Reaper, D.Va, Mei, Widowmaker, Zarya