Help! Stuck on pattern decrease

I am knitting the Back to school u-neck vest from Fitted knits. In the pattern she is always very specific on when to use k2tog and bind off, but in the upper front she just says Dec 1st. I am unsure as to which I should use as the last two rows used bind off. So at the end of the rows is the dec 1st just that or a bind off? Thanks for any help.

A bind off is different from a decrease; they dec several sts in one spot, and a dec just decreases 1 st in one place. If you’ve done the underarm as BO X sts and now it’s saying to dec at both ends of the row, then you would ssk at the beginning of the row and k2tog at the end.