Nearly a million businesses around the world can now set up a single online store to sell products, with no fee, on Facebook and Instagram.
"It's bigger than usual just because we want to make sure we're moving quickly to get these tools in the hands of as many businesses wherever they are, big or small, to help them survive during this time," Facebook's Layla Amjadi said.
The shopping feature will also eventually appear on WhatsApp and the company's other messaging apps and integrate with live streams.
Once a buyer decides they want to spend money, they will usually be directed to the company's website to complete the transaction.
And if problems arise or a buyer wants to ask questions, they can do so through Facebook Messenger, WhatsApp, or Instagram Direct messages, some of which are already used by companies for that purpose.
The rollout is part of a wider range of changes planned for shopping across Facebook's products, including:
a loyalty scheme that will link things such as points from local coffee shops to Facebook
a Shop button, where products and brands will be showcased, on Instagram's main navigation bar
"After all, if your favourite store has changed their hours, or switched to online delivery or kerb-side pickup, they've almost certainly posted about it on Facebook or Instagram,"
"So it makes sense for Facebook to make the purchase process as easy as possible from those profiles.