Use this if you created your own unique character.
These are the most common and user-friendly mods. A "Card" is essentially a save file of a character. When you download a card, you are downloading the specific slider data and outfit choices made by another user.
Completely new, user-created hair, clothing, skins, textures, and accessories (often distributed as .ab or .zipmod files) that the character cards require to display properly. Essential Prerequisites for Modding