[fyt2024]

I use Inkscape. And if I miss something then it is Xara Xtreme or the former free version vor linux

But what does it mean to optimize an SVG?

[ffhhj]

To remove the extra info. Inkscape adds a lot of stuff. For example export a simple SVG from Figma and open it in Inkscape, then save and compare.

[aothms]

It does, when you save. Under export, there is also a "Plain SVG" option which excludes the xmlns:inkscape and xmlns:sodipodi namespaces and therefore eliminates quite a bit.