Besides sharing Google Documents with specific people, you also have the option of changing the visibility settings of a Document to make it accessible to the public. This is an excellent option for Documents that do not contain sensitive or confidential information and need to be shared with a large group of people, including some who do not have Google accounts.
Why would you want to make a Document public? Well, it could be an easy (and paperless) way to share a classroom newsletter with parents and students, send out an informational flyer, or just post public information on the web (like meeting minutes, policy documents, etc.) The best part is, if you make a change or a correction to the Document, it is immediately available to the public!
Here's how to make a Document public: