How it works

Who can see it

Five settings, an expiry date, and a read-only switch.

The settings

link
Anyone holding the URL. Not listed anywhere and not indexed. This is the default.
public
Open to the web, and search engines may index it.
domain
Anyone signed in with an email address at a domain you name.
named
Only the addresses you list, signed in.

A public email provider is refused as a domain rule. "Anyone with a gmail.com address" is not a company — it is the open internet wearing a narrow-looking rule.

Two more switches

An expiry date
After it, nobody can open the document — not even people who could yesterday. Expiry beats every other setting, including workspace membership.
Read-only
People can open it but not comment. Existing threads stay visible. Useful for anything published to be read rather than marked up.

What readers need

Nothing, for public and link. The private settings ask the reader to sign in, because that is the only way to know it is really them.

Reading is free and always will be, whichever setting you choose.