what is the purpose of the slide master in powerpoint

The purpose of the slide master in PowerPoint is to control the overall appearance, formatting, and design of each slide layout, and consequently, each slide in a presentation. It allows users to establish rules for the layout and appearance of every slide, ensuring a consistent look throughout the presentation. By making changes in the slide master, such as modifying fonts, inserting footers, or customizing background graphics, these changes are applied to all slides based on that master. This feature is particularly useful when users want all slides to contain the same fonts and images, as changes made in the slide master are automatically applied to all slides. Slide Master view also enables users to modify individual slide layouts, create new layouts, and save custom layouts, providing a high level of customization for presentations.