Promotion extensions are another feature that can be added to search engine ads. They allow you to highlight any special promotions or deals that you're currently offering, such as discounts or free shipping.

When you add a promotion extension to your ad, it will display additional information about the promotion underneath the ad itself. This can help to catch the user's eye and encourage them to click through to your website to take advantage of the offer.

Promotion extensions can be especially helpful for e-commerce businesses, as they can help to increase sales and drive more traffic to your website. By highlighting a specific promotion or deal in your ad, you can create a sense of urgency and encourage users to take action right away.

Currently It is possible to use 3 kinds of extensions :