Choosing a size
SVGs are drawn fresh at any size, so you can export a crisp PNG at 1×, 2× or up to 4× the SVG's own dimensions. Use 2× or more for images shown on high-resolution phone and laptop screens.
Transparent or solid background
Keep the background transparent for logos and icons you'll place on other colors. Turn it off to get a solid background, which some apps and upload forms need.