The article provides a step-by-step guide on how to send SMS notifications to readers when new WordPress posts are published. It requires the installation of a custom WordPress plugin, which allows users to store their phone number and receive instant SMS notifications when a new post is published. The plugin uses Twilio's PHP library to send text messages to subscribers, who need to have their phone numbers stored in their user profiles. Once activated, the plugin can be tested by publishing a new post and sending an SMS notification to all subscribers with registered phone numbers.