Describe what visitors need to accomplish
Begin with the visitor’s task. Someone may need to understand your service, compare your work, make an enquiry, or manage an ongoing project. Write down those tasks before deciding which technology or platform to use.
A presentation website can be a sensible brief when the main goal is to explain an offer and help people contact you. If people need private records, different permissions, or a workflow that continues after the enquiry, include those needs explicitly.
Map what happens behind the screen
A booking button is only the visible beginning of a process. Your team may also need to review a request, assign someone, confirm availability, and keep the customer informed. Describe those responsibilities alongside the pages.
List the systems you already use and which information should move between them. Ask who owns each record, who can change it, and what happens if an integration is temporarily unavailable.
Define the first release
Separate what is necessary to complete the main journey from improvements that can follow later. A clear first release lets the delivery team discuss scope, effort, and tradeoffs with fewer assumptions.
Bring examples of your current process, the content you already have, and the result you want. Those inputs help an agency propose an approach grounded in your business rather than a generic feature list.