The hiring manager would like to know that you are able to sell a product to a client by referring to the benefits it will bring them. Take the interviewer through your typical selling process but do make it brief.
"When I am selling to a client based on the benefits of the product, I first take the time to ensure that I understand what problem it is that I am trying to help them solve. I will tie their challenge into what the product can do to help them. Having the client agree with the connection of problem vs. solution is also really important."