Platform for the digital distribution of video games on PC, Mac, and Linux. There is a website with the catalog of games at this address:
https://store.steampowered.com/
And in order to be able to enjoy the games, it is necessary to install a free program on the computer, called a client. You also need to create a free Steam account.
When the client is installed, one can then download the games to one’s computer.
Steam is the most popular digital distribution platform in the world, it contains many advantages that the competition does not have, and millions of users.
The only disadvantage is that it does not have all the games available on computer, but the vast majority of them.