Tasks are a component of Key Results, that are used to determine

what needs to be done to reach your Key Result's and eventually the Objectives.

Similarly they are a part of a project and determine what needs to be done to achieve a project successfully.

Tasks can be associated with KR’s, can be associated with Projects or they can be independent.

Whenever a task is aligned with a KR, tasks progress does not roll up to a KR’s progress, unlike Key Results and Objectives.