Shaman’s early game in particular because he is very strong in some areas but weak in others.
He has very high attack damage, high damage on his nuke on low levels and very long single target disables great for kill attempts if your lane partner(s) have enough damage. Because of this he is great at bullying single enemies and even securing kills on low levels with his disables.
At the same time, he is relatively slow, with a sub-par attack range and he is very squishy. This means that offensive dual or trilanes who can get on top of you are extremely dangerous and you need to make sure you are positioned safely against them. Harass for a bit on early levels and then if the lane becomes too dangerous once your opponents get levels you might want to start rotating for ganks or pulls instead of standing in the lane and risking death.