Display Advertising is online advertising using a visual ad on a website. Most display ads include a headline with promotion or branding message along with a graphic/image, contact information and a button to learn more, buy the product or service or get more information.
These display ads are embedded throughout websites like CNN, Fox News, USA Today, ESPN and the majority of websites.
The Interactive Advertising Bureau (IAB) works with online publishers to develop standards in display advertising to help agencies, media companies and businesses to create ads to use online. Check out their interactive guide that has detailed advertising specs, a glossary of terms and creative formats.