After the pause, drive the hips up out of the hole as you would in a normal squat and continue your ascent.
Why might you do pause squats or where might you see them in your programming?
Let’s say your coach has programmed you within a Heavy-Light-Medium structure or something similar - in this case, you might see a pause squat show up as a medium day squat or a light day squat (the loading and volume need to be carefully managed - especially if it’s a light day squat).
Due to the pause at the bottom, the pause squat - like the pin squat and box squat - eliminates the stretch reflex (the “bounce”) out of the bottom, so it’s a disadvantaged squat, and thus you’ll need to use a lighter weight than with your regular squat, so it fits the bill for a medium or light squat. However, as with the pin squat and box squat, remember that “lighter” does not necessarily mean easy.