What a campaign service is meant to cover
The campaign service would help you get through the story the way you want, played by an experienced player:
- completing a set of story missions you choose, or the story up to a chosen point;
- help with a specific mission you are stuck on;
- completion goals (such as optional activities or collectibles) if the game tracks them.
Story spoilers are your call: we would ask before doing anything beyond the missions you picked. See also money and leveling, or all GTA 6 services.