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A growth-driven design blueprint is the written strategy a team agrees on before it builds. It should include the business goal the site serves, the evidence about what buyers need, a ranked list of what to build, a plan for the pages in the first release, the measures the release will be judged by, and the person responsible for each decision. The word also names a narrower product. Lean Labs sells a Design Blueprint that sets a site's visual direction, and a project can need both.