Ad Extensions are the best way to incorporate more information within your ad at no added cost to you. If you're currently running any Google Ads, you should be using Ad Extensions for several reasons, the first is that they're free, and the second is that they give users additional information which is another reason for a consumer to interact with your ad. Some of the ad extensions are automated meaning that Google AdWords will add the extension information to your ad such as the click to call and automated calling or sitelink extensions by pulling the information from your website. Whereas, other ad extensions are manual, meaning you can choose to customize your ads according to your own preferences. There are several ad extensions to choose from, and should be selected based on which one will help your advertising campaign to meet your specific business goals.