I’m not a big fan of the UDN documentation for the UFUNCTION specifiers. With BlueprintCallable, BlueprintPure etc getting their own page, with 1 or 2 sentences as well as lacking documentation on a quite a few Meta specifiers. Some are really handy (Looking at you ExpandEnumAsExecs).
So I have made up a bit of a cheat sheet, that can be printed and stuck to the wall in front of you. Feel free to look at it here: https://docs.google.com/document/d/1pel80zXwvulkDL_O4_7HjEbBMgxRMQrWrx_HghY7gHw
I hope you may learn something new from it. Would love some feedback or corrections.