Bandwidth
The amount of data that can be sent over a network connection in a fixed amount of time.

Banner
Graphic image displayed on an HTML page used as an ad (Source: IAB)

Behavioral targeting
Ads served based on user behavior - web surfing habits, response to advertisements, etc.

Browser
Software used to access Internet sites. Browsers can be either text-based or graphical.

B2B (Business-to-Business)
Businesses selling products or services to another businesses

B2C (Business-to-Consumer)
Businesses selling products or services to end-consumers

Button
Small banner. Buttons are typically 88 x 31 pixels.