The sample prospect is a test contact that exists to helps PitchKraft create a realistic preview email. Blueprint Builder uses the sample prospect details to show how the email theme, hook and personalization search work together for one real-world style person. The sample prospect is not stored as part of the Blueprint and is not used for any bulk sending.
You can either type a real contact from your list or ask Blueprint Builder to create a plausible example. Typical details include name, company, website, work email, location and an optional LinkedIn URL. Once these fields are in place, PitchKraft can run the personalization search on that prospect, apply your Blueprint logic and generate an example email that shows you what your campaign will look generally like in practice.