What does the 'Compress Pictures' feature do?

The 'Compress Pictures' feature in PowerPoint is designed to reduce the file size of images within a presentation. This is particularly useful when preparing a presentation for sharing or when trying to optimize it for web-based use. By compressing images, PowerPoint effectively decreases the amount of storage space that the images take up, which can result in a smaller overall file size for the presentation.

The process of compression involves reducing the resolution and removing unnecessary data from the images. This function can help improve the performance of the presentation when loaded and reduce the loading time for viewers. It's exceptional for maintaining a balance between image quality and file size, as it allows users to choose from different levels of compression that can lower file sizes while preserving enough quality for viewing needs.

While the other options might address aspects related to images, they do not accurately describe the main function of the 'Compress Pictures' feature in PowerPoint.