It puts them into other, and it has a faster unsubscribe interface, though it doesn’t already work. When you delete a message you can trash or mark done all from the same sender, so that is nice.
For that use case you might look into Sanebox. It runs on servers and I think has a good reputation for that kind of filtering.
Personally I haven’t had too much issue with promotional email though, so I would take my comments here with a grain of salt. I can’t really speak to it.
The other folder filtering is decent, but I imagine gmail is also good at that with promotions.
