Like an on/off switch, Public mode allows anyone with a link to access and complete your typeform. Private mode restricts this access to only you, anyone else visiting its link will see a “404 (Not Found)” message.
When you start building a new typeform it is set to Public by default. If you’d like to make it Private until you’re ready to launch (or when finished your research and want to close it for new entries) just head to the Configure panel and flick the switch to Private in the General section.
Remember to click on Update settings button at the bottom of the panel!
If you’d like to close a campaign and don’t want respondents to find a “404 (Not Found)” error message when they access the typeform’s URL, there is a way to close your typeform without making it “disappear”. It is done by disabling the button on the Welcome screen rather than switching the form to Private mode. Please refer to the article Close your typeform to new entries to learn about the details.