So you had a good initial meeting (like a 1st coffee with a new girl), and you have agreed to have a Specification Review (aka first date).
For the majority of new clients, a Specification Review (also known as a Spec Review) will be your 1st paid engagement with them, and gives the client a smaller first commitment. This is to work out the requirements and put together a broad time and cost estimate.
It is a simple 4 step process:

✅ Figure: Good Example - The backlog is constructed during the Spec Review
✅ Figure: Good Example - CRM Record showing the sales stage of the Opportunity after the Spec Review has been booked