The author of the article demonstrates how to send daily animated GIFs using Firebase, Giphy, Node.js and Twilio MMS. The author starts by updating their existing app to include a picture in their daily message, replacing the previous code with new lines that use the `giphy-wrapper` node library to interact with the Giphy API and pull random GIFs tagged "puppy". The updated code then sends these GIFs to users who have subscribed to receive updates using the Twilio node helper library.