VGSites gives you a page on the school's site that is genuinely yours: an actual website at your own address, with your name on it, rather than a profile inside somebody else's app. Students and staff get exactly the same thing here, because personal sites are personal first, so a teacher's site is theirs the same way a student's is.
What people put on them varies. A portfolio is the common one, so an application gets a single link instead of a folder of attachments. Past that it's about-you pages, or a home for a project that needed an address of its own: a science fair entry, a capstone, a club side-thing. Whatever it is, it gets a permanent address you can write on a résumé.
Getting one going is a sign-in and some typing. Use your school email, get a one-time code, and start from a clean layout that already looks right. Add your text, photos and links, move things around until it feels like you, then publish. It goes live at your own address and reads well on a phone, a laptop or a school Chromebook without you doing anything about it. You can keep changing it forever.
And it stays yours, which isn't a figure of speech. Download the whole site whenever you like. Graduating, or you just want it somewhere else? Take it with you.