The basics of racking your weights after use are self-explanatory, but if you’re placing one in your home gym, you’ll also want to think about where it should go.
Ideally it will be close to where you want to lift, but it also shouldn’t be in the middle of the floor for safety reasons—keeping it nearer to a wall is generally a better idea.
The floor should also be solid and level, to provide a good foundation for the rack.