Marvel Cinematic Universe.

Avengers: Endgame is the finale of a series of 22 films!
Well people watch the movies in different orders. I mean, some watch in chronological order, some watch in release order and others just watch it all over the place but If you have watched Endgame, but felt daunted by the sheer size of the MCU, never fear! Here's everything you need to know:-

That is how you watch the marvel movies, In case you haven’t seen them keep this in your notes.
Iron Man (2008) - The Incredible Hulk (2008)-Iron Man 2 (2010)- Thor (2011)- Captain America: The First Avenger (2011)- The Avengers (2012)-Iron Man 3 (2013)-Thor: The Dark World (2013)-Guardians of the Galaxy (2014)-Guardians of the Galaxy Vol. 2 (2017)-Captain America: The Winter Soldier (2014)-Avengers: Age of Ultron (2015)-Ant-Man (2015)-Captain America: Civil War (2016)-Spider-Man: Homecoming (2017)-Black Panther (2018)-Doctor Strange (2016)-Thor: Ragnarok (2017)-Avengers: Infinity War (2018)-Ant-Man and the Wasp (2018)-Captain Marvel (2019)-Avengers: Endgame (2019).

image source: Marvel

So we have to start with the Iron man because it is the first one to happen (not chronologically; Captain America was the first Avenger). Then leads to our next avenger, The Incredible Hulk, seeing Stark in the end brings us back to the Iron Man 2. In the end of Iron Man 2 Thor’s hammer is found which will obviously bring us to the world of Thor later, In the end of Thor Tesseract is discussed and in Captain America : The first avenger we get to know more about Tesseract. Now move on to The Avengers, My favourite MCU movie till date. Thereafter, we move forward to the Iron Man 3 and then to the Thor: The dark world. Where we introduces to ‘the collector’ which later on leads as a character in the Guardians of the Galaxy we go further to the Guardians of the Galaxy 2 after that we move on to Captain America: The Winter Soldier featuring scarlett witch and quicksilver get fully introduced in the Avengers: The Age Of Ultron. You get Ant-Man which leads directly into Captain America: Civil War. Civil war consists of a scene in which peter parker rests in his bedroom, leading to Spiderman: Homecoming. In civil war we were introduced to Black Panther after which you have Dr. Strange and then Thor Ragnarok, Thor Ragnarok has a scene where Thanos’s Ship rises in the air and Avengers: Infinity war takes place after this scene ends. After Infinity War you have to watch Ant Man and the Wasp in order to understand it better then finally we have Captain Marvel connecting to the Avengers: Endgame.