It does the same things a typical CRUD backend does (REST/realtime API, authentication, authorization, validation, etc.). For example, you could use it when building a simple todo mobile app that syncs your data in the cloud. The catch is that the moment your requirements fall outside what the system supports, you are more or less f*cked.

While that may be true, it is worth seriously checking the docs and working out what requirements you have or might have. Pocketbase does an awesome job of providing extensibility, likely most of the stuff you want that’s not fully out of the box can be added in 20 lines of code or so.