Story point size is a relative measure of the effort and complexity involved in implementing a user story. It is not based on the team size, the number of days it will take, or the priority of the story. Rather, it is based on the comparison of the story with other stories of similar or different sizes. Story points help teams estimate how much work they can complete in an iteration, based on their past performance and current capacity. Story points also help teams plan and track their progress at the program level, by aligning the features and capabilities with the stories that implement them.Reference:Story - Scaled Agile Framework,A Guide to Story Point Estimation - DEV Community,What should be taken into account when estimating Story poin - Madanswer