The video walks through how to use a chatbot flow to create a Facebook ad. The advertiser first creates a flow and sets up a Facebook ad campaign with the goal of sending users to the chatbot. They then set up the ad set, choosing the Facebook page and chatbot flow they created earlier. In the ad, they add an image and text, and configure the quick replies. They then connect the chatbot flow to the ad by copying the bot payload id. To finish, they preview the ad in messenger.