Sometimes I really wanted to create “Read me” note on specific page(s) for other users before they start editing the page(s) so they will be aware of it.
Here are few examples… see screenshots attached.
Lastly, this is probably the most important of all. This could be very useful if some page(s) have .php file extension. Some PHP codes will not show up in Preview (using Windows box) but publishing to live site (using Linux box) will work. I always tell them to create example.php page to test it out on live site before putting on the real page… something like that. I hope I make sense.