Identifying the Minimal Marketable Feature (MMF) is part of Lean UX, which is a user-centric approach to designing and delivering products. An MMF is a small, self-contained feature that can be developed quickly and that delivers significant value to the user. It is the smallest unit of functionality that can be released to the market and generate feedback.Lean UX advocates for releasing MMFs as early and often as possible, to validate assumptions, learn from users, and iterate on the product