Game Engine - Steering Behaviour Understanding

I am working on a BGE Horror Game right now and I want the enemy to follow the player around, but not directly. I want it to also walk around radon parts of the map even when the player is not there. Is this any possible with the Steering Actuator? And also, I have seen the different behaviours that I can apply (Path following, Seek, Flee). What is the difference between these 3?

Thanks in advance!