Facebook has been tracking everything you say for years now, but even consumers' email is no longer safe from the prying eyes of keen marketers. Marketers who want to promote their product to a very targeted audience, are using gmail users' content. Mention looking for a car in an email to a friend, watch the car ads appear.

The gmail process, a Google product, categorizes and then places you into a target audience for a marketer who is paying for a particular type of consumer. Gmail ads are available to marketers through the AdWords platform.

Edge works directly on clients' social media campaigns, including gmail adwords and pay-per-click.