Newbie wine making question...

[CEversole]

Why is it important to "air" the must? What does this do? Is it totally necessary?

 

[Honda88]

yeast need oxygen in the primary fermentation to reproduce and stay healthy, wip the must prior to pitching and do not use an airlock, then periodically stir the foam "cap" thats on top of the must to release gas buildup and let in oxygen.