What format is commonly used for saving presentation slides?

The commonly used format for saving presentation slides is PPTX. This format is specifically designed for Microsoft PowerPoint presentations, which is a widely used application for creating and delivering slide shows. The PPTX format supports various features essential for presentations, including text, images, videos, animations, and transitions between slides. Being a proprietary format of PowerPoint, PPTX allows users to take full advantage of the software’s capabilities for visual storytelling and conveying information in an engaging manner.

While other formats such as PDF are useful for sharing or printing documents, they don’t retain the interactive or dynamic features intended for presentations. DOCX is associated with Microsoft Word documents, primarily used for text processing, and XLSX is linked to spreadsheet files in Microsoft Excel, which are focused on data manipulation and calculation rather than slide presentations. Thus, PPTX is the optimal choice for saving presentation slides specifically tailored for use in PowerPoint.