Merchant Promotions is a free feature that allows sellers to distribute online promotions with Shopping Ads on Google.com. When Merchant Promotions is configured within the Merchant Center, shoppers see a “special offer” link containing the designated promotion (e.g., 20% off, free shipping, or $20 off a purchase of $100). Implementing Merchant Promotions as part of your advertising efforts on Google offers a variety of benefits, including boosting click-through rate, increasing conversions, and capturing multi-screen traffic.
If you have Google Shopping campaigns and would like to advertise promotions with Merchant Promotions, you must complete the Merchant Promotions interest form. Requests to participate in Merchant Promotions are only reviewed if you have a Google Merchant Center with an active products feed. Currently, Merchant Promotions is only available in the following countries: Australia, Germany, India, France, the UK and the US.