If you've spent some time in the content section of your Swell site, you may have seen the toggle that looks like this:
Active and Hidden are similar, but different. If you want your page to be visible to visitors at all, the Active toggle needs to be checked. If you want the page to be accessible, but hidden from the tab list below your page header, you'll also want to check the Hidden box.
For more info about this, check out this article.