Labs are nifty add-ons to google mail and calendar. They add functionality that you can enable, test out and then continue using or disable (if you decide you don’t like it).
No software updates to install. Just click ‘Enable’ and you’ve got it.
Once in gmail, click on the green beaker in the top right corner of your screen.
Find the lab(s) you want to use and click “Enable.” You can later click “Disable” if you no longer want to use the lab.
Click “Save Changes” at the bottom of the screen.