How do they work?
So, when you visit a website that enables cookies, it adds a cookie to the device you are searching on. For example, if you are searching Amazon.com for a new wireless router. It will add a cookie to your device. Once you leave that website and visit Facebook or another location that allows ads, you are now seeing advertising for the wireless router that you were looking for.
Are they good for your business?
For a business like yours, cookies can be a major asset in figuring out how customers are interacting with your company online and giving you the opportunity to continue to market to them even after they leave your website.