It stands for Progressive Web App. It allows websites to be treated as a standalone app without having to download it from a storefront. When done well, it's hardly distinguishable from a proper native app. It's a cost-efficient way to create a cross-platform app that works with basically any browser.
Thanks. I think I get it now. I have been using voyager, followed the instructions and always wondered how it installs despite not being on the appstore. From how you’ve explained it, it seems to be less taxing on the phones computing resources, right?
It should be no more taxing than a web page, so I think you're correct. I have both apps and haven't done a direct performance comparison, but I will say the PWA seems to be just a tad snappier, imo