PPTM is a presentation file format used by Microsoft PowerPoint. It is similar to PPTX but supports embedded macros, which allow users to automate tasks and add interactivity to slides. PPTM files are commonly used for business presentations, educational materials, and corporate training sessions that require advanced functionality.
PNG is a lossless image format that supports transparency, making it ideal for logos, icons, and web graphics. Unlike JPEG, PNG doesn’t lose any image data during compression. It retains high-quality detail, especially in images with sharp edges, and is commonly used for design work where transparent backgrounds are required.