World Quest

World Quest is a quest category in Destiny 2. In The Edge of Fate it covers optional Kepler quests that unlock after the campaign progresses. Guides usually call them side quests; the game data tags them as world quests.

Kepler world quests

Correspondence, Dark Academia, Forensic Horology, Hyperreal G-Man, Orientation, Sacred Emergence, Skylines, The Man Out Of Time, The Paper Crane, Transfer of Power, Turophile, Vessel of the Nine, plus Explore Kepler: Fabled and Explore Kepler: Mythic. The Explore Kepler pair appears after the campaign, at 150+ Power (Fabled) and 200+ Power (Mythic); they reward Matterspark IV and unlock AION Adapter armor variants. The exotic quest Graviton Through the Ages is a plain Quest, not a world quest.

Unlocking

Reports differ on when these open: one account has side quests opening after The Exile's Accord Strangelet and The Central Academy Strangelet, another places Dark Academia after the Outer Steppes Strangelet, and the Dark Academia page says after the mission Morphology.