It's all automated for each one, and yeah they write the metadata into the folder. I have Radarr/Sonarr/Prowlarr + Ombi + rtorrent, which pretty much automates everything. I just type in what I want and it shows up in all 3 a minute or two later. Sonarr also keeps track of TV schedules, so if it's a new show that is still airing it automatically shows up when a torrent of it becomes available.