Comparison Shopping engines are a great way to market and generate sales for your online store. If you are unfamiliar with Comparison Shopping engines(CSE), CSE’s are sites that aggregate product listings, prices and product descriptions from a large number of merchants in order to help shoppers make informed buying decisions. Chances are, you’ve already used comparison shopping sites in the past and just didn’t realize it. For example when I do a product search on Google, I’m often presented with a bunch of vendors all at once in order to find the lowest price. And whenever I click on one of the listings, I’m taken directly to the shop owner’s website where he/she pays the CSE a cost per click for the referral of my business. These types of advertisements are also called product listing ads or PLAs for short. Anyway, a comparison shopping engine allows a ...