Product adoption is a crucial factor in determining the success of consumer products and tech startups. Companies that focus on product adoption often succeed by ensuring people sign up for and use their products, leading to investment and revenue. The process of product adoption involves distinct stages such as awareness, interest, evaluation and trial, adoption, and ongoing reevaluation. Understanding these stages can help businesses prepare communication, user experience, and customer service accordingly. Metrics like adoption rate, product awareness, sign-up rate, activation rate, daily active users, and utilization rate can be used to measure product adoption progress. Strategies to drive product adoption include getting the launch right, curating "Aha!" moments, stimulating engagement through multiplayer experiences, building in virality, and supporting your users.