Player (Quest Component)
Inside your character blueprint add the actor component Quest Component.
This component is used to handle the quests for the player, it allows you to begin, forget and restart quests, it also keeps track of the player's active quests and their progress.
It also provides functions that can be used to check the state of the quests, for example, you can check if the player has a certain quest, if they are at a certain progress in a quest, if they have completed a quest, etc.