I've never seen this on a tip sheet before, and I don't know where I learned it myself. It may be one of those (rare) things I learned all on my own.
If you want to create a title for a chart that updates with your data, it's pretty simple.
Create a formula (one line only, but you can use CHAR(10) to create multi-line titles) that refers to the information you want in the chart title.
I often do this on a hidden sheet, so that users don't inadvertently mess it up. Something like:
Let's say that this is on sheet "Hide Me", cell A1:
=Sheet1!A1 & " as of " & CHAR(10) & TEXT( NOW(), "d-Mmm-yyyy")
In the chart, select the existing title and IN THE FORMULA BAR enter:
= 'Hide Me'!A1 (You can't enter this formula in the 'Chart Title' block in the dialog box, or it will come out as plain text. But do enter 'something' there, so that you have a title to 'edit' in the formula bar.)
Your chart will print with a new date each day, and you (or your user) won't have to remember to update the title.