SVG — the SVG format — is essentially distinct from JPG. Whereas JPG stores pictures as a raster of pixels, SVG saves graphics as mathematical descriptions of shapes, lines and colors. Which means SVG graphics can be displayed at any size — from a small icon to a large banner — without quality loss.
Converting JPG to SVG is a technique known as vectorization, and it is very beneficial for logos and flat artwork.
Prior to converting JPG to SVG, it is necessary to know what the conversion actually does. JPG files are a raster image — a static grid of image pixels. An SVG is a scalable image — a collection of paths that a browser renders as the graphic.
This works extremely well for clean images with distinct shapes and limited colors — icons, logos, symbols and flat artwork. It works less well for complex photos with thousands of colors.
For best output, Illustrator's Image Trace function gives the most precision. Open your JPG in Illustrator, select the image, open the Image Trace settings and select an relevant setting.
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