Definition

A rectangular advertisement displayed on a webpage, usually ignored by 99.95% of viewers but somehow still a multi-billion dollar industry.

Example Usage

We placed a 728x90 leaderboard banner ad at the top of the blog post.

Origin

First banner ad served in 1994 on Hotwired.com, pioneering web advertising.

Fun Fact

The first banner ad achieved a 78% CTR, but that was before banner blindness became a psychological phenomenon.

Source: Display advertising and IAB standards

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