Billion dollar businesses are built on high customer retention. It's not about everyone hearing about your product. It's about everyone who does hear about your product using it successfully.
High customer retention is built on a great onboarding. Understand your customers' goals. Do they need it, do they want it, and are they capable of progressing?
Your onboarding must improve as your product improves. Don't snack. Don't focus on the low hanging fruit and low effort work. Focus on impact.