I think it’s like one team has an advantage and a disadvantage for something, I’m not sure, but I found a lesson where Kostya Kavutskiy has a lesson about it

I think it’s like one team has an advantage and a disadvantage for something, I’m not sure, but I found a lesson where Kostya Kavutskiy has a lesson about it

Imbalance means that one side has strengths and weaknesses significantly different from what the other side has. And vice-versa of course. A few examples are:
What do you mean by imbalance in chess?