DEERFIELD, Ill. — Walgreen Co. has relaunched its weekly circular, giving the Sunday promotional piece a new look and tying it into the retailer’s online and mobile ­platforms.

“This is the most dramatic refresh we’ve made to the weekly ad in more than two decades, delivering added value for our growing numbers of online and mobile customers, as well as a better experience for those who look forward to seeing it in print,” president of daily living products and solutions Joe Magnacca says.

The new print design includes coupons grouped by category on easy-to-find pages as well as sale items featured more prominently throughout the flyer.

Walgreens has also added QR codes to the circular, enabling mobile users to view more deals directly from a smartphone. Customers can also visit category-specific Walgreens websites highlighted in the ad or find extra bonus buys inside stores.

The new online and mobile circular has hundreds of additional in-store offers, online-exclusive pages and other “bonus buys.” The online ads also allow for social sharing via Twitter and Facebook, the creation of advanced shopping lists and more.

According to a Nielsen study, over 70% of shoppers want retailers to offer digital advertising inserts. Walgreens says that as its website traffic grows, online views of the circular are up over 50% in the past year.

“We know that for approximately half of the visitors to walgreens.com, their next action is to go to one of our stores to shop,” Magnacca says. “For our loyal customers who don’t use computers or the Internet, all of the items we feature online each week will also be specially marked in our stores.”