Somewhat regularly, I write about ripping DVDs and Blu-Rays. I tend to prefer physical media and sometimes—especially when buying an older TV series or classic movie—the disc won't include a digital copy. So I rip the disc—this way for Blu-Rays, or just via HandBrake for DVDs—to create my own digital copy.
Once ripped, the problem is that I have a video file that will play, but that has no useful information about what the video is—no metadata about the cast, production year, or (for TV series) season and episode. If I try to add the movie to the TV app (or iTunes, as on my iMac), it will require some hand editing to wind up in the right category, and it still won't have any show information.
Enter Subler, a free app to help you "tag" (add metadata to) movies and TV shows. There are probably other apps out there that do this, but Subler works quite well for me, especially for TV shows.
When I rip a TV series, I'll give the files a filename based on its title and (for TV series) season and episode, like Wings S01E01, or Sports Night S02E04. I then drag and drop the ripped file onto Subler's dock icon, and it opens a window, showing all the metadata associated with the file; here's how the window looked after I ripped the first episode of Sports Night: