This is a handy little feature. It won’t “change your life,” but it’s nice, nevertheless.
“When you create a new Numbers, Pages, or TextEdit document and fill it with content, the AI model on your Mac accesses it, analyzes the content, and suggests a suitable name for the file. For example, after a few minutes, my ordinary Numbers file became “User Engagement Metrics iOS 27.” On a Pages document, the app appropriately recommended the file name “iOS 27 Review” after a few minutes of writing.”— 9to5 Mac