Modding means modifying a game. A mod can be a small user-made change or a large project that adds new content, systems, maps, visuals, rules, or fixes.
What mods can do
Mods can improve graphics, add characters, translate text, fix bugs, rebalance gameplay, add missions, create custom maps, or turn a game into something almost new.
Why modding matters
Modding can keep games alive for years after release. It also lets communities experiment with ideas that the original developers may never add.
Not every game supports mods, and online games may restrict them to prevent cheating or unfair advantages.