Tysons Corner Center will add seven new stores to its retail lineup this fall — after the back-to-school rush but before the all-important holiday shopping season, which can count for up to 40 percent of a retailer’s annual sales. The mall, which opened a massive expansion last year, continues to add to its retail offerings in an effort to boost its already high attendance and compete in an increasingly tough market.

“Anytime you bring in a new store, especially if it’s enhancing the current offerings, it will help drive traffic,” said Patrice Duker, a spokeswoman for the International Council of Shopping Centers. “That’s one of the challenges that shopping centers across the country face, bringing in retailers that will keep bringing in customers.”