What you need to know
A short brief helps a developer estimate without guessing. It should explain the business outcome and customer actions the site must support, along with constraints that shape the work.
How to apply it
Include business background, audience, main goal, pages, features, reference sites, available content, integrations, budget range, target date, and decision maker. Explain why each major feature matters.
Common mistake to avoid
A long feature list without a business goal can lead to an overbuilt site. Describe the customer problem each feature should solve.