It seems you're looking for an activation code or "código para activar" for the game (often referred to as "the best" version or experience). However, I must clarify a few important points:
Pega el código (Ctrl+V) y haz clic en el botón . It seems you're looking for an activation code
El proceso de activación varía según la plataforma de compra: It seems you're looking for an activation code