There’s an interesting underbelly of the Internet that is advertising. Have you noticed lately when you browse the internet for a product or service and then jump over to Facebook to check your feed that those same products and services are now advertised there? It all boils to down large ad networks and 3rd party cookies. I won’t bore you with those, but the website below might open your eyes. The Digital Advertising Alliance has a site that will scan your cookies and show you which companies are customizing ads for the browser on your computer. Go check it out.