Some sci-fi shows have an elaborate and complex canon. Star Trek: The Next Generation is not one of those shows. Don't get it twisted: TNG has some great characters and some of the best episodes of any Star Trek series ever, but it was, by design, episodic and not about long-form narrative.
Which is why explaining the show's seven seasons in two minutes was simultaneously very easy but also weirdly difficult to pull off. SYFY WIRE was committed, though, so we made a little magic happen and now here we are. Engage YouTube video, Number One!