How are missions unlocked in gta online?

The only information available from the cited Wikipedia entry concerns the basic nature of Grand Theft Auto Online as an online multiplayer action‑adventure game set in a fictional version of Southern California, its release dates across platforms, and its general open‑world design. It does not contain any details about the mechanics of unlocking missions, such as whether missions are earned through progression, purchased, or accessed via certain in‑game actions. Consequently, based on the evidence at hand, we cannot specify the unlocking method for missions in GTA Online.