Read the slide at its intended display size
A presentation often uses small labels designed for a large screen. After export, inspect text, chart legends, and thin rules at the size where the JPG will appear. JPEG compression can soften edges, particularly around high-contrast type and diagrams.
Review colors and gradients for banding or halos, and compare the image with the slide in the source deck. If exact lettering matters, PNG may preserve sharp edges more reliably when accepted by the destination. Choose JPG when its compatibility or photographic compression fits the actual use.