Avoid acting as if you know their products or services. If you don't, they will easily be able to tell if you have not done your research. Avoid discussing products and services that are not similar to theirs unless it relates to how you can add value to their current sales process.

If you have done your research then let them know that you have and how you have previously sold similar products or services in prior roles. If you have not sold similar products or services or have not done the research, discuss what products and services you have been successful in. End your answer with why you have been successful and how you can bring that same success into the role that you are interviewing for.

"I have briefly looked at the products and services listed on your website and noticed that you sell ABC product. In my role at XYZ company, I sold a similar product that paired very well the CRM platform and this increased my average sale by 30% once I started to sell them as a package. My experience in selling similar products along with my history in quickly learning new products and services make me confident that I will excel in this role."