Modding is the process of modifying a game’s files to change its content, behavior, or appearance. In The Sims 3, modding is a popular way to add new content to the game, such as custom objects, clothing, hairstyles, and gameplay features.
There are many different ways to add mods to The Sims 3. The most common method is to use the Sims 3 Package Installer, which can be downloaded from the official Sims website. Once you have installed the Sims 3 Package Installer, you can simply double-click on a mod package file to install it.