Quora is a Q&A social platform where users from around the world can ask questions and get an answer from a diversified community. So, the goal of Quora is to share and grow the user's knowledge, and in my opinion, to measure its growth, I will focus on two significant metrics, engagement and retention.   To track customer engagement, measure the total number of questions answered over time because it's important for users to get the answers, as it is the platform's purpose. To track retention, measure how many users return to the platform in 30-days because they find it valuable. And one more important metric to measure is the percentage of questions with one answer with five upvotes. These metrics measure the qualitative and quantitative value of Quora.