You really need both: solid, intuitive product design and good new user onboarding. Even with a great product, new uses will still need help discovering and understanding how to get value from your product.

Tooltips aren't always the answer though. Onboarding that's more seamlessly integrated into the experience are better, like Retool, Superhuman, or Intercom. You can see those experiences here: https://twitter.com/philvb/status/1617921908510699520?s=20&t...