Bounce—Percent of messages sent in an email marketing campaign that bounces back to the sender's box because they were undeliverable due to addressing errors.
Click-Stream Data—Type of
preference/behavioral information a website collects about its visitors. Consists of such parameters as referring website (where visitors come from), time, browser type, operating system of computer,
and IP address.
Dynamic Ad Placement—Process by which an ad is inserted into a page, in response to a user's request versus a static or hard-coded ad placed on a page. With sophisticated ad server
tools, ad placement can be determined by a visitor's usage patterns, demographics, and/or other preferences.
Interstitial Ads—"Something in between." Webpage that is inserted in the normal flow
of content in a website —a pop-up window or screen. An "intrusive" ad unit that is delivered without specifically being requested by a user.
Profiling—click-stream enhanced with demographic and
geographic user info (typically collected via a registration form users agree to fill out upon visiting a site) as well as offline purchase records, email addresses, and other identifiable parameters
conducive to better ad targeting.