Worst times to miss pills ?

I’m on week 2 of my combo pills and I know some weeks are way worst because of like ovulation right but if you’re on the pill, you aren’t ovulating... so why is it bad to miss the pills during like week 2 & 3 (I know its bad duh but just don’t know why it’s supposedly especially bad during those weeks) can someone explain? Do you start ovulating or something if you miss a pill or two during week 2 of your pills ?