Deleting a site in Zoho Sites is a permanent process, so it's worth following the steps carefully and being certain before you begin.
If you no longer need a site live right now, but might want it back at some point, unpublishing is a reversible alternative to permanent deletion.
An unpublished website isn't accessible to visitors, but can be republished later if needed, unlike a deletion, which is final.
If you've also set up a Zoho organisation (for example through Zoho Mail, tied to your site's domain), you may need to delete that organisation first before Zoho Sites will let you close the account entirely. This is done from the relevant product's own control panel (such as Zoho Mail's Control Panel, then Dashboard, then Delete Organisation) rather than from within Zoho Sites itself. Cancelling any auto-renewal on a custom domain separately is also worth checking, since deleting the site doesn't automatically cancel a domain's own renewal.