When I say space, I mean the space in your home you used the most. If there is no such room, in terms of you using every room in your home more than just your private space, then answer for home.
My house is super small, so the thing that helps the most is a wax warmer. We have a ton of scented wax (which is basically like candles) and when we’re cleaning or just want to freshen up the place, we turn the little lightbulb on and place the wax on it. It will make the whole house smell amazing.
The second thing we use the most is candles. Smells good and has a nice aesthetic.
And the final thing is air fresheners. We mostly only use them for the bathroom, but I have used it in my room because my cat box is in there and will stink up the room.