Confidential has a legal meaning. When parties sign a business confidentiality or non-disclosure agreement, there is a clause that covers materials designated as confidential. There are penalties for disclosing or distributing those designated materials.

A public webinar NEVER features confidential information. Always assume that everything you display and say in a public webinar instantly becomes part of the public domain and is discoverable by competitors. Confidential materials are materials you only show to people who have signed a nondisclosure or confidentiality agreement with you. Internal employee presentations, partner training, and some customer communications may fall under this label. Marketing, lead generation, and public outreach webinars never do.

What should you write on your slides instead?

You can (and should) claim copyright ownership so others can’t legally reuse your work. An attendee who comes to your webinar is not bound by any statements.

Take the time to make the distinction. Most of your webinars and presentations are not confidential. Make sure you can clearly identify the ones that are!

Copied from: http://wsuccess.typepad.com/webinarblog/2017/05/stop-calling-your-presentation-confidential.html