HTML5 Ads are like mini web pages and require multiple file types to create the ad display and ad features. These files need to be packaged in a way that optimizes load performance and reduces the time it takes to display the ad. However, ad developers may not know how they can produce a visually appealing and interactive ad while making the ad easier to load. In addition, HTML5 opens up a diverse set of choices for designers. This guide is designed to help designers navigate the different choices in technologies like javascript, CSS, SVG, video formats, and codecs as well as understand how they are served and executed for maximum performance.