Using keys from unofficial lists or "key generators" found on public forums or PDF-sharing sites is not recommended, as these codes are often already used or blocked or finding where to purchase the legacy version Support - Euro Truck Simulator 2
Assuming they meant the second version, which is the more popular and recent one. The main points to cover would be the activation process using an email and activation code, and maybe the top features. I need to explain how to purchase the game, the email confirmation, the activation code, and how to redeem it. Also, address common issues users might face, like activation errors or code invalidity.