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To start receiving notification emails, simply install the TheFind's Glimpse app on Facebook. You'll receive an alert when an item first goes on sale and when it is further discounted.
The system is undoubtedly useful and easy to install, but it has one unfortunate drawback: If you Like a product on say, Nordstrom, and it goes on sale over at Net-a-Porter, you won't receive a notification. CEO Siva Kumar says that capability will come later; for now, "our first focus is on providing benefit to the 11,000 retailers we partner with by delivering incentives such as free shipping and coupons to the people who Like that retailer’s products," he says.