Logo and Mobile options are not needed if you use an .SVG and leave these fields blank. The SVG can be placed in the template root/images/presets/your preset folder and will work for all device situations and handy for high resolution such as Retina for higher quality.
You do not need to use an SVG in these folders. You can use an image.png or .jpg also in your presets folders.
Your choice of Image or Logo Text.
Simply choose your image if Image is selected from Logo Type for your primary logo.
This is handy when you need to match your Logo to the Header Height.
If an image is chosen then it will hide your primary logo and show instead in mobile and other smaller view devices beside desktop view.