Loki is a Marvel Cinematic Universe series with 6-hourly episodes. It revolves around Loki (Tom Hiddleston), or at least a Variant of Loki that managed to escape Avengers custody during Avengers: Endgame. This Loki is quickly caught by the Time Variance Authority, i.e. the time police, who stop and destroy any variations to the time line. This means that the MCU has been one timeline with no variations (and I guess the Spider-Man animated movie with all the different versions of Spidey come from different universes, not different timelines).

Anyways, Loki is to be de-rezzed but Agent Mobius (Owen Wilson) convinces his supervisor to lend him Loki. There is a super variant out there that's eluded the TVA for years and has recently started hunting TVA teams in the field. And that super variant is another Loki...

Kind of like WandaVision this is a series that has big surprises and twists in every episode. While WandaVision the surprises were in the world that we eventually discover who created, here it's the twists of time and timelines and the secrets of the TVA. I do feel that the last episode or two where we get the final reveal and resolution are a bit anti-climactic. And it definitely sets up a second season with a goal ahead of time (both WandaVision and The Falcon and the Winter Soldier end their season at a point where you don't need a second season).

Overall a good series and if I ranked the three MCU series I've watched on Disney+ it'd be WandaVision, Loki, The Falcon and the Winter Soldier.