To find out, just click on the key icon which is located in the upper right-hand corner. As a result, many users do not know which version of Chrome they have installed.
Whenever Google releases a new update, which it does quite often, it installs the corresponding files. Google Chrome doesn't rely on the user for updates, it just updates itself.
It relies on Google's servers to achieve this. Google Chrome is one of the fastest browsers, if not the fastest, on the market.