A small edit can be made on the page itself. A rebuilt page, or a set of them, is better prepared out of sight. HubSpot's content staging, available on Content Hub Professional and Enterprise, puts website and landing pages on a sandbox domain. You can clone an existing page or start from a blank one, and you can replace several live pages at once when the work is ready.
Staging separates the pages. It doesn't separate everything those pages rely on. A change to a shared template, to global content such as a header, or to a HubDB table shows up on every live page that uses that asset, even when you made it while working on a staged page. So clone the shared asset first and change the copy. In the pricing example, text and layout edits that belong only to the staged pricing page stay on that page. A change to the site-wide header belongs in a cloned header until launch.
HubSpot's theme test mode previews a change to the theme without being able to publish it, so a theme-level change still needs its own publishing step.
When a staged page replaces a live one, the original page's analytics carry over, so the numbers before and after the change sit on one record. For a relaunch that goes beyond a few pages, see how to plan and execute a HubSpot website redesign.