Display advertising is advertising on websites or apps through banners or other ad formats made of text, images, flash, video, and audio. The main purpose of display advertising is to deliver general advertisements and brand messages to site visitors.

According to eMarketer, Facebook and Twitter will take 33% of display ad spending market share by 2017. Google’s display campaigns reach 80% of global internet users. Also, desktop display advertising has eclipsed search ad buying in 2014, with mobile ad spending to overtake display in 2015