Susan, a workshop on vectors is a great idea! Thanks for that.
And to answer your question sooner, svg files are vectors used mostly in cutting machines. PSP does not handle those as vector, which is too bad. If you find svg files, you will lose their vector capabilities in PSP. If you need svg, you would have to use other programs like Inkscape. Luckily, if you need a file for a cutting machine, they can also take png files (at least, the one I use, the Cricut).