Original sentence: " They welcome people to the store and prevent shoplifting.All Wal-Mart stores have employees referred to as "People Greeters.At Sam's Club these employees check the shopping carts of every exiting customer against the receipt.Most Wal-Mart stores have employees known as "People Greeters", whose primary responsibility is supposedly to welcome people to the store.Their actual job is to prevent shoplifting.They will stop some people as they are exiting the store and check for receipts of merchandise
Edited sentence: All Wal-Mart stores have employees known as "People Greeters", whose primary responsibility is to welcome people to the store.They also assist in preventing shoplifting