In Agile Development Methodology, what is the meaning of 'Points'?

Points are used to weight the importance of Tasks to be completed in a User Story $($the more points, the more important$)$

They represent the count of the number of tasks needed to complete a User Story.

Points are used to weight the relative size of the User Stories $($the more points, the more effort is required$)$

A measure of the complexity of a Task.