Documents are encrypted in your browser. Keep the complete link: its fragment contains the decryption key.
Create a private document — only you can read it while signed in, using the complete link.
Anyone with the complete link can read a public document. Choose this before writing. Public and private documents use separate stores; changing the URL does not change access.
Create a document for public sharingChoose an expiry of 5 minutes to 1 week. Burn after reading removes the document when its encrypted data is first fetched, even if decryption fails.