The critical importance of onboarding for SaaS companies cannot be overstated, as it transforms new customers into lifelong power users and is a key factor in higher customer retention. Onboarding is a continuous process that ensures customers get value from the product at every stage of their lifecycle. A simple yet effective tool like Product Tours can help businesses create rich interactive guides to onboard users without involving engineering or design teams, resulting in 7x more engagement than email. To level up onboarding, it's essential to start with user interviews, understand the "why" behind the product, define who the target audience is, and measure the success of active users. By implementing these strategies, businesses can drive more engagement and achieve a better customer experience.