I come from a background in political science and I've heard of and dealt with a bit of Focaultian thought/theory. Personally, I never cared for it nor did a lot of people in my field take it seriously in my experience. I've heard that some historians value his work theoretical framework.

Why is he important?

From what I can understand of him, his writings aren't that historically accurate and to me he seems of full of himself and the historians who use this theoretical framework don't appeal to me.