the sales presentation must demonstrate that the product/service meets the prospect's needs, priorities, constraints and motives, or the prospect will not even consider buying or moving to the next stage; this is why establishing the prospect's situation and priorities during the questioning phase is so vital
the above point is especially important to consider when the sales person has to present on more than one occasion to different people or groups, who will each have different personal and organizational needs, and will therefore respond to different benefits (even though the central proposition and main perceived benefit remains constant)
all sales presentations, whether impromptu (off the cuff) or the result of significant preparation, must be well structured, clear and concise, professionally delivered, and have lots of integrity - the quality and integrity of the presentation is always regarded as a direct indication as to the quality and integrity of the product/service