max-age=0 vs no-cache

max-age=0

This is equivalent to clicking Refresh, which means, give me the latest copy unless I already have the latest copy.

no-cache

This is holding Shift while clicking Refresh, which means, just redo everything no matter what.

Sorce: https://stackoverflow.com/questions/1046966/whats-the-difference-between-cache-control-max-age-0-and-no-cache