NEW YORK (AP) — Long before there was a global coronavirus pandemic, brick-and-mortar retailers struggled to get people to walk through their doors instead of shopping online.

Now those retailers are faced with an even more Herculean task: how to stay on people's minds — and more importantly their pocketbooks — when many of their store doors are closed.

More than 250,000 stores like Macy's, Nordstrom and Nike that sell non-essential merchandise have temporarily shuttered since mid-March in response to the pandemic. That's 60% of overall U.S. retail square footage, according to Neil Saunders, m...