Chrome will check and install updates without any interaction from you, but if you want to make sure you are on the latest version, follow the steps below:
1. Click on the 3 dots in the top right-hand corner
2. Click on "Help", and then "About Google Chrome"
3. You will see ONE of the messages below.
Chrome is up to date (no action is required):
Chrome is in process of downloading/updating (it may ask you to relaunch Chrome when finished):
Chrome may have already updated on its own (you will need to click on "Relaunch"):
Chrome is checking for updates , then it will download/update (it may ask you to relaunch Chrome when finished)