A call extension is a feature in digital advertising that allows businesses to include additional contact information, such as a phone number or call button, in their online ads. This extension makes it easier for potential customers to reach the business directly with just one click, increasing the chances of conversion. Call extensions are especially beneficial for businesses that rely on phone calls for sales or inquiries, as it provides a convenient and immediate way for customers to connect with them. Additionally, call extensions can also track and measure the success of ad campaigns by recording the number of calls generated, providing valuable insights for businesses to optimize their advertising strategies.