When an advertiser wants to place its ads on other website, mobile apps, gaming console to increase awareness about its product or service, it is called display advertising. The ads can be text, image or video.
The display advertisement space can be purchased directly from the owner or it can be done with the AdWords or other ad network. Through AdWords you can place advertisement on the Google network and its content partners. Google has more than 1 million content partners, it consists of well-known news pages, mobile apps and online games.
The Display Network reaches 83% of unique internet users around the world (source: DoubleClick Ad Planner), including people speaking more than 30 languages in over 100 countries. To help make sure your ads appear on high-quality sites and products, all websites and products in the Display Network are reviewed and monitored by Google.