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Point snaphost at almost anything you have made and it becomes a live site. snaphost figures out what kind of content it is when you publish, so there is nothing to configure.
.ipynb file renders as a live notebook.You can keep a site as a draft until you are ready, so nothing is reachable before you publish it.
Built a real app, not just a single page? It works. Deep links like /about or /pricing keep working even when someone refreshes the page, so your app behaves the way you expect. Larger apps and asset-heavy sites are supported too.
If you build your app from code, there are a couple of small setup tips (a relative asset path and reading the base snaphost injects). Those live in the developer docs.
For safety, a published site cannot quietly pull in code or data from other places. If your page genuinely needs to load a font, call an API, or embed content from another site, you can allow those specific sources in the site's settings (a Premium capability). Everything else stays blocked by default.
Every site gets a share link right away. To serve it on your own domain instead, see Custom domains.