A buyer guide should help someone make progress on a decision. It can explain what an offering is for, which questions matter and what needs to be discussed with a specialist.
Start with the customer's decision
Choose one audience and one offering. A purchasing lead, site manager and technical reviewer may need different information; make the intended reader clear.
Make the next conversation easier
Include the information a customer should gather, the questions your team can answer and the questions that need further review. Organize the guide around the buying conversation, not the order of an internal product manual.
Be clear about what is not yet known
A guide should not imply that technical suitability, price or delivery timing has already been confirmed. Explain who can resolve those questions and what they need first.
A useful guide leaves the buyer better prepared for the next conversation, not with an unsupported promise.