坦克英雄在坦克世界中的主要作用是什么？

I wonder what makes a tank tank hero in this game and how does it play its role?

Tanks are strong. These massive creatures join the fight with their resilience, making them hard to kill by opponents. But being tough isn't enough for a tank; its primary function is to control the pace of the battle. Tanks can open up fights so that teammates can catch up, and they can also protect teammates from danger by staying away from risky situations.