Afterward, they earned their new moniker by turning on their digital babes. Move over, White Anglo-Saxon Protestants. You're being replaced by wireless application service providers. So, companies go after a bigger share of your wallet. Just because you haven't seen them, doesn't mean they're not there.
Web bugs are invisible images.
They were first used on Web pages and now are increasingly being used in HTML e-mail, They allow marketers and others to gather data about you. Generally, they are one pixel by one pixel images that are impossible to spot. They don't want you to know you're being tracked. But, in truth, any visible image would serve the same purpose. And Web bugs are evolving.