a small window that opens up on the screen to allow input or give a warning notice

A form of advertisement like a button, except it “Pops up” when a page is opened.

A type of advertisement that is automatically displayed in a second smaller browser window apon loading or unloading a normal web page. Pop ups advertisements tend to cost advertisers more since their visibility is higher but are often considered annoying by web site visitors since they are considered obtrusive.

Window that opens in a browser when accessing a web page. Pop ups are often a form of advertising used online.

An extra window that opens over top of your web-page you are trying to view. Usually trying to sell you something, or re-direct you to another site.

To open a window.

An ad that displays in a new browser window.

An ad that spawns a new browser window. Mostly loathed by web surfers.

A "pop" in internet marketing terms is an advertisement that opens a new browser window or tab on the users computer. A pop up opens a new browser screen that pops on top of your current browser window (thus popup). It is initiate via Javascript code loaded when the user views a page on the site. (aka popup)