Keep in mind there is a caveat when you're exporting crystal clear images, and it's this: The higher an image's resolution is, the bulkier the total file size will be. So, unless you want to look unprofessional, there's absolutely no reason for you to export low-resolution images. On the other hand, a low-resolution image will lead to your slides turning out blurry, grainy and pixelated. They're bright, crisp, and bursting with color. When it comes to image quality, you have to use high-resolution images. We're talking resolutions like 3000×2250 or 4000×2250! Why High-Resolution Images Matter
This way, PowerPoint will export only high-resolution images. What we are going to do is configure PowerPoint to export images at 300 DPI instead. And these awful resolutions are what lead to your ugly pictures.
This forces your pictures to be exported at awful resolutions like 960×720 or 1280×720. PowerPoint is configured to export images at 96 Dots Per Inch (or DPI). By default, when you save your PowerPoint slides as an image, it comes out pretty crappy.
