How do you activate terraria mods?

To activate Terraria mods, you typically need to use a mod loader like tModLoader. First, download and install tModLoader from Steam or the official website. Then, launch tModLoader, which will allow you to access and manage your mods through the in-game mod browser or by manually placing mod files in the "Mods" folder. Once installed, you can enable or disable mods in the mod menu before starting your game.