Definition of Story Points:
Story points are a measure used to determine the effort needed to implement a user story. Story points are relative and thus do not relate to a certain measure of time; they can be anything from tee-shirt sizes to the Fibonacci Sequence.
Use of Story Points:
Story points are used to determine how much effort will be needed for a user story. Planning Poker is one method for assigning story points and arrive at a workload estimate.
Benefits of Story Points:
- Provide a common, relative measure of effort.
- Save time when making precise estimates.