Ad extensions are extra pieces of information you can add to your Google Ad, like your phone number, address, links to specific pages on your site, or short highlights about your business. They make your ad take up more space on the search results page and give people more reasons to click. The right way to use them is to only add extensions that are relevant to what you are offering. Adding a call extension, for example, only makes sense if someone is available to answer. Which extensions have worked best for you?