Final answer:
The 'expectations gap' should be closed by service providers, ensuring their service delivery aligns with what is promised. To gain buyer confidence amid imperfect information, sellers can offer credible testimonials, a comprehensive warranty, and maintain business transparency.
Step-by-step explanation:
The gap to be closed in this context is the expectations gap. This means service providers should ensure that what they promise through their communication aligns with what they can actually deliver. Doing this helps to manage customer expectations and prevent disappointment.
To reassure a possible buyer who is dealing with imperfect information, a seller can use a variety of tactics such as providing credible testimonials, offering a comprehensive warranty, and demonstrating transparency in their business practices. By implementing these methods, they can build trust and assist in the purchasing decision process.