Who would have ever thought that fast-food Mexican chain Taco Bell, faced with sagging sales in 2011, would find life again in a taco with a Doritos-flavored shell? The Doritos Locos Taco was launched in March of 2012, and with more than 200 million units sold, it has become the chain’s best-selling new product ever, even helping to lift profits for Yum! Brands, Taco Bell’s parent company, by 23 percent. The company credits much of the DLT’s success to marketing campaigns using Instagram and Twitter.
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