Growth from incremental and consistent optimization of the core product is important, says Lenny Rachitsky.Focusing on getting users to engage more with existing key features can lead to significant growth.The ARIA framework for increasing user adoption and engagement has four principles: Analyze, Reduce, Introduce, and Assist.Analyzing data to identify key features that are correlated to growth is the first step.Reducing friction through simplifying feature use, reducing steps, minimizing effort and cognitive load is the second principle.Raising awareness in context and motivating users to sue features is the third principle.Assisting users with tools such as templates and AI recommendations and results is the fourth principle.Prioritizing optimization of existing features over new feature design increases a product's utility and engagement.Ken Rudin shares his ARIA framework, which has been successfully applied to several Google products, and at ThoughtSpot.Product teams should use the framework as a cheat sheet to increase engagement with existing features in an ongoing process.