I was checking the quote tables in Database and stumbled upon quote_preview table, anyone have idea what it is used for ?
quote_preview table is a part of Magento Content Staging functionality. As a user should not be able to place an order during preview mode, all quotes are stored in
quote_preview table (payment infrastructure has additional validation for the preview mode) and this table is cleared by cron.
The more details about this functionality you can the official documentation.