Send SMS Notifications from Google Sheets with Twilio

In this tutorial, we learn how to use Twilio's Programmable Messaging API and the Google Sheets API to send payment reminders to customers listed in a Google Sheet. We create a custom menu in the Google Sheet that allows users to input their Twilio credentials securely. The script then uses these credentials to programmatically send SMS reminders when a customer's payment is past due or coming up. Users can also choose to send notifications based on a date range, ensuring customers receive timely payment reminders.