What is a key difference between SVG and PNG image formats?

The key difference between SVG and PNG image formats is that SVG allows scaling without loss of quality, while PNG images may lose quality when scaled. SVG, or Scalable Vector Graphics, is based on vector graphics, which means that images are composed of paths defined by mathematical equations. This allows SVG images to be resized to any dimension without compromising their clarity or sharpness, making them ideal for responsive web design where images need to adjust to different screen sizes.

In contrast, PNG, which stands for Portable Network Graphics, is a raster format that relies on pixels to represent images. When a PNG image is scaled up, the individual pixels become larger, often resulting in a blurry or pixelated appearance, thus losing quality. This difference in scaling capabilities between the two formats is crucial for graphic design and web development, particularly when high-resolution graphics are needed. Therefore, the ability of SVG to maintain quality at any size makes it particularly advantageous for logos, icons, and any graphics that require flexibility in display size.