Shortcut key to add new slide in PowerPoint is:

🧠 Explanation:

The shortcut key to add a new slide in PowerPoint is **Ctrl + M**. This shortcut quickly inserts a new slide into your presentation, making the process of creating slides faster and more efficient. Using keyboard shortcuts like this one helps maintain your workflow without needing to use the mouse or navigate menus. It is especially useful when working on presentations with many slides, allowing you to focus more on content and design. Mastering such shortcuts can significantly improve productivity while preparing professional presentations.