Display Ads are comes in many different forms and sizes. Most of the display ads we use will be responsive by default. Meaning that Google can resize it and serve seamlessly within any piece of content, regardless of user screen size. There are also rich media ads that can attract more attention from users. The next thing is mobile optimized ads, also known as AMP HTML ads. These ads are faster, lighter, and more secure. AMP HTML ads are a more efficient and secure way to advertise on the web.