What would happen to all your stuff when you die?

It might be a relevant question since it has a foot in actual probability more than fluff. What would happen to all of your stuff, there are things which both you and your spouse possess (if you have a spouse), or stuff you have that is just you, what becomes of it when you die? I went to a neighborhood yard sale, one where multiple people on the same street of cul-de-sac hold their yard sale at the same time, and some of the people were selling tons of stuff, some of it new and never been opened. Other stuff, slightly used but they outgrew it. My thought is if they died their spouse or relatives are stuck figuring what to do with all that stuff, even those with no value except the departed. What if they have no close relatives, who gets stuck with the task?