SwiftUI and Node.js Full Stack - Build Twitter - iOS 16 - Tweet Image Check

In this tutorial, the instructor explains how to modify a tweet schema by adding a method to check for the presence of an image property. This involves creating a function that returns a boolean value indicating whether an image exists for a tweet. The code implementation is detailed, and its importance for future episodes is highlighted, as it will be used to display images in the application.

What is the first step mentioned in modifying the tweet schema?

Explain the significance of the Boolean value in the context of displaying images in the application.