Patrol
From Destinypedia, the Destiny wiki
Explore[1] (a.k.a. Patrol) is a game mode of Destiny. These missions are open-ended and focused on exploration. Players touch down in an open area and are able to explore at will, along with taking on tasks assigned to them.[2] Minerals and other resources can be found that can be used on weapons. This is a "lower intensity" game mode compared to others.[1]
Players can bring with them a fireteam with two other people, but can also encounter other players while on patrol. Patrols are useful for gathering miscellenous loot such as materials, consumables, hidden chests, or rewards for miscellenous faction missions. Missions can be acquired on patrol by locating and activating beacons.