Storypoints do not mean "time". Time would be too concrete and measurable and would be bad for selling more agile coachings. Instead storypoints represent "effo

Storypoints do not mean "time". Time would be too concrete and measurable and would be bad for selling more agile coachings. Instead storypoints represent "effort". What does it mean and how can it be used to estimate a shipping date? I was told that I just don't understand.