Section 8 housing

[PaulW]

A friend was telling me recently about her problems with Section 8 housing nearby. Despite doing some searches, I can't figure out why people would ever turn their property into a Section 8 house. It's a noble thing to do but that isn't usually what motivates people.

Does the government guarantee the rent even if the tenant can't pay, perhaps? Or pays the rent when the house is empty?

Thanks for any enlightenment.