What can mods do? Mods are extensions that you can add to the single-player mode of GTA 5. From big adjustments to the graphics for more realism to implementing various goodies like weapons, cars, or ...
If you need any convincing, you could check Not AJ's video above that goes in-depth about what sets this modpack out from simply using the two mods above, but I can't force you to use this or consider ...