SVG is perfect until something refuses it: social networks, marketplaces, slide decks, email clients and most app stores want pixels. PNG is the natural raster target because it keeps the transparent background and the sharp edges of a logo or icon. Unlike the SVG, a PNG has a fixed size, so render it at the largest size you will need; scaling a PNG up later blurs it.
PNG holds a single still image, so an animated SVG does not stay animated. The defaults suit most files. Under Options you can resize the result and set the scale the vector is rendered at.
The SVG is drawn at its own width and height (taken from its viewBox if it has no size) times the scale set under Options, scaled down if that would pass 16,384 pixels a side or 64 megapixels. Scripts inside the SVG never run and files it links to are not fetched, so text in a font the SVG does not embed is drawn in a fallback font.