Question about painting over a scan

[Delfin93]

[quote pid='6045' dateline='1517995552']
A better way is convert the image to a vector. There are on-line tools for this but I use linux. SVG is attached.
[/quote]

Allright! I googled it, but did not find an understandable answer to the question:

What is a Vector in GIMP?
And for what is the attached SVG-File?

Watched some turtorials on youtube, but somehow missed this part

Okay, I will try it out again with the PlugIn

Thanks!