Seriously, what exactly does “I take responsibility for this” mean? Is Mark Zuckerberg going to resign as CEO or step down from the board or go with no pay for

Seriously, what exactly does “I take responsibility for this” mean? Is Mark Zuckerberg going to resign as CEO or step down from the board or go with no pay for a year or two (including bonuses)? He says he’s accountable, but how exactly does this move hit him hard (except for a punch to his ego)? If there are no consequences of significance for him, what’s the meaning of those words? What do the people who aren’t laid off to trust anymore?