Facebook launched a new set of Shopping-related Activity notifications to help shoppers keep track of updates from your brand. This is an opportunity to help build proactive shopping alerts for people interested in purchasing your products. New notifications include:
Price drops on saved products
Price drops on items in a user’s bag
Product launches available from a brand someone follows
Reminders of items left in a user’s bag
Back-in-stock reminders on wishlist items
At this point, these notifications are not customizable. Facebook will continue to launch and test new notifications over time to help people rediscover products from the brands they love. See how some of the notifications will appear below.