Andrew McGivery, an application developer, explains the implementation of the "Pull to Refresh" feature using the Ionic framework in mobile applications, specifically by employing the ion-refresher directive. This mechanism allows users to update content in a feed by pulling down on the list, triggering a refresh function that retrieves new data from an API. In the example provided, the Random User API is used to demonstrate how to fetch and append new data to an existing list within an application. McGivery elaborates on setting up the required components, including a factory for API calls and a controller to manage data flow and refresh events. The article provides a step-by-step guide on how to integrate this functionality, including handling data loading and user interface updates, offering developers a practical approach to enhancing user experience in their Ionic apps.