The PNG format is widely supported and works best with presentations and web design. It is not vectorized which makes it unsuitable for enlarging after download or for print use.
The SVG format is vectorized which makes it editable and widely supported by design software and web browsers. SVGs can be scaled to any size without loss in quality, which also makes them suitable for print purposes.
For other, more specific purposes, the icon is also available for download in formats such as