Here it is

A lot of people smoke too far out from entrances, which allows people to push up into the smoke, and use the part of the smoke that's sticking out for cover from different angles as they do so. If you want somebody to not push an area, that's no good.

The solution is to make it so the edge of the smoke is flush with the entrance, without a big chunk of the smoke sticking out. That way they have no ability to use your smoke against you.

So I guess the tip is twofold: prevent enemies from using your own smokes to their advantage, but also here's how you can take advantage of self-smokes and bad smokes by the enemy.

Source: the galorants discord