Pros
Strong Peel with Ultimate
Good Mobility for a Tank
Good Lane Pressure
Can block enemy Autoattacks
Can withstand Poke with Passive

Cons
Engage has short range
Only a single hard CC spell
using Ultimate requires lots of knowledge and awareness

Playstyle 1: Playmaker
This works well with a self sufficient ADC, so you can Roam a lot and help other lanes and your Jungler. Usually you engage level 2 Botlane if possible and lane normally until level 6 (A roam mid after recalling before 6 is ok aswell). After level 6, you only go Bot if theres a Play to make. You usually keep your Ult and just roam to other lanes and keep an eye on the map. Communicating with your team when you see a good Ult is key, so they can actually use the pressure your Ultimate gives you. During the Midgame, your job is to lurk around a vulnerable ally and allow them to CS, while watching for any Play that your team does to commit for with your Ult if needed. Lategame, you either try to hit crucial targets with a flashtaunt or Ult your hardengaging ally to pop up in the backline.

Playstyle 2: Peel
This is what you do, if you have a hard time making plays. That can be because the enemy sololanes are hard to gank or your ADC is a scaling champ or whatever else. Your job is to keep your carries safe and enable them to CS and scale throughout the entire early and midgame. Stay Botlane and never just randomly Ult away to leave your ADC to die, alwys make sure you actually can just leave. Afterwards, your job is to keep your carries alive in fights. You stay near them and taunt whoever dares to touch them and Ult them if needed.