The workflow automates sending personalized congratulations using Google Sheets, Twilio Messaging, and n8n workflow automation. The user needs a Google account, an n8n account, and a Twilio account, with the latter providing SMS capabilities. A visual workflow designer in n8n is used to create an automated process that integrates with Google Sheets, allowing users to add contacts with their phone numbers and event details such as birthday dates and names. The workflow checks if today's date matches the event date, sends a personalized congratulatory message using Twilio Messaging, and includes various nodes for obtaining data from Google Sheets, merging information, personalizing messages, and sending SMS notifications. The user can save the workflow and toggle it to active mode to send out congratulations messages. Additional features, such as email or Twitter integration, are possible with further modifications.