This Scribe shows you how to add footers and headers in Google Sheets. Note that a Google sheet won't have a visible headers and footers until you decide to print.
1
Navigate to your spreadsheet
2
Click "File" and then "Print"
3
Open up the "Headers & footers" section of the menu that appears on the right hand panel
4
Checking "Page numbers" will have them appear on the lower right corner
5
Checking "Workbook title" will have it appear on the upper left corner
6
Checking "Sheet name" will have it appear on the upper right corner
7
Checking "Current date" will have it appear on the lower left corner
8
Checking "Current time" will append itself to the current date in the lower left corner