Walgreen Co. has a powerful mobile commerce program that encompasses an m-commerce site, mobile apps, text messaging and more. One area where it has been leading the charge is social/local/mobile. It offers programs where consumers who use a social check-in service at a Walgreens receive a coupon or special offer. "Having over 8,000 locations within three miles of most U.S. households means location is a big part of our value proposition," says Rich Lesperance, head of digital marketing and emerging media. "Social check-ins were organic, because our stores are part of everyday life. Our successful check-in programs added fuel to this trend, more than doubling check-in volume through programs like our Flu Shot check-in campaign, where we donated a flu shot to someone in need for every check-in."

• Date Launched:2009
• Unique Visitors:9617581
• Web-based Sales:Order the Hot 100 issue