Due to a security vulnerability, Google is urging users of their Chrome web browser to update to the latest version. As the article mentions in the first link below, Chrome updates are usually automatically performed.
To see the current version of Chrome on a Mac, you can access the Chrome menu in the top left while in the browser and choose “About Google Chrome”. The second of two links below explains how to check if on a Windows-based PC.
This is another example of ensuring that your software is kept up to date.