@ducky_71457 mods are extensions that modify game play created by third party users. You download these mods and put them in the mods folder. You may have to unzip the mod before placing it in the mod folder. As these mods are created by third party users they are not tested and EA does not authenticate these mods - you are on your own. If you have issues with a mod you need to go to the developers site for assistance. EA recently put out the November patch that updates the games core code. This may (probably) require users to update their mods (redownload new version from developers site) for the game to run with mods after this patch.