A Banner ad script is used to create new banner ads for use on various webpages. The script is the actual computer language that allows images, slogans, facts, and anything else that is seen on the advertisements. The script also allows the user to attach a link to the ad, which users can then click on to be taken to a website where more information on the product can be found. There are a variety of ways to learn how to create the banner ad script, but there are also templates that can be used.