There's a growing trend where customers want to order online, but pickup their purchase locally. This maybe because the item is too expensive to ship, or because they want it right there and then.
With Airsquare you can offer this concept of 'click & collect' to your customers.
All you need to do is add a shipping rate called something like 'Pickup in-store' and ensure the shipping price is set to $0. During checkout the customer can choose this shipping option. They then proceed as normal through the checkout process where they pay online and you receive a notification of the order. You'll see the shipping option they've chosen, so you know to expect them to collect in-store.
UPDATE: We've now added 'Pay in-store' as a payment method, so you can now offer the ability for customers to order online, then pickup and pay in-store.