Animation Graph Assets

In the Assets panel click the + button on the top left, then select Animation Graph.

This creates an animation graph asset named by default.

Once the animation graph is created, it can be edited it in the Animation Graph panel, please refer to the Animation Graph Panel documentation for details.

Animation graph assets need to depend on the Animation Controller component to be applied to the object.

Click Add Component -> Animation -> Animation Controller at the bottom of the Inspector panel to add the Animation Controller component to the node.

Then click the arrow icon button behind the Graph property box of the animation controller component to select the animation graph asset.