What are the types of placeholders that can be placed on a master slide?

On a master slide, the main types of placeholders include title placeholders, content placeholders, and image placeholders. Title placeholders are designed for slide titles, while content placeholders can hold text, charts, tables, or multimedia elements. Image placeholders specifically allow for the insertion of graphics or photos, ensuring consistent layout and formatting across all slides based on that master. Additionally, there may be placeholders for footers, date, and slide numbers.