Spider-Man: Far From Home continues Spider-Man's story from the MCU (Marvel Cinematic Universe) and is about Spider-Man dealing with loss. The film then focuses on a trip that he takes, along with his classmates to Europe, where a lot of mayhem ensues.
I won't spoil the twist, but it's a fine one, that is quite different from what we have come to expect from these big superhero blockbusters.
I enjoyed Spider-Man: Homecoming and have to say, I liked this a little better. The scenery is lovely and the visual effects are great. Also, I just liked hanging out with these characters and having a nice trip with them.
You can also watch this if you haven't caught up with Avengers: Endgame, although it's better if you do, but you can still have fun with it.