Magazines are collectible items in Detroit: Become Human. Once picked up and read, they will appear in the Extras menu. There is a silver trophy called BOOKWORM which is unlocked when all 46 magazines were collected.
The magazines inside the game play a somewhat significant role in making the player understand how the world functions outside of Detroit, contributing to the factor to make the game more realistic and lifelike.
For a guide on the exact location of each magazine, refer to BOOKWORM.