Generally means 'very' or 'really'.
It'
s the NorCal counterpart to the SoCal "Dude" in terms of frequency of use. In SoCal, hella is used more satirically, because it is so ridiculous. Then again, so is dude.
Hecka is to Hella as heck is to hell, obviously. But
Hecka is even more ridiculous.