What exactly *is* Custom Content? How can I add it to my game and create it?

Hello
Cc stands for Custom Content, and it is items that other simmers make, such as clothing, furniture, hair etc. It is non EA -made items, that aren’t in game packs, the base game, or given through patches.
Some cc though are recolours of ea made items.
Gallery items are homes, Community venues, or sims households that can be downloaded and placed in your game.
Mods and cc are often terms used interchangeably. Script mods are files that either add in features to the game, or fix up game issues.