Twitter is introducing a new tool for advertisers and shoppers—to turn your credit card into a coupon, and make its ads more valuable. A new product called Twitter Offers allows advertisers to offer consumers a deal, which they can quickly add to their credit card, to redeem in stores or online.

So let's say a big brand like JC Penney or a local coffee shop offers 10 percent off in stores or online—consumers can click to add the deal to their credit card. (The first time consumers have to add their credit card information, each subsequent time the credit card info is saved). When consumers make a purchase the discount is automatically applied, sending users a Twitter notification that the offer has been redeemed. The savings appear in users' credit card statements. The company won't reveal what brands it's testing with; sources say it'll be a mix of large retailers, restaurants, and maybe a sports league.