In the official Unity Animator State Machine tutorial video animation clips are dragged out from the assets folder into the animator and dropped.

I have a 3D model that i bought online to experiment with that comes with animations. I added a custom made animation as well. These all work well in my demo project. But when i add a animator to the assets and try to drag and drop animations onto it it doesnt work. I get a forbidden-sign as a mouse pointer. I try to add animations through the inspector but that does not work either.

The tutorials makes it seem so easy and does not talk anything about what animations can be used. What am i doing wrong?