As a PM for Meta, how would you measure the success of launching a job marketplace?

"I interviewed for a Product Manager role, and the process was two 45-minute phone screens followed by three onsite rounds. The phone screens were product sense and product execution, and the onsite repeated those with one extra leadership round. What stood out to me was how syllabus-driven the whole thing felt. I found a big list of common questions online, prepared answers, did mocks, and most of the questions I got were from that same list. I would call the difficulty about a 5 out of 10 because there were basically no surprises if you prepared well."