Google Chrome is the most popular browser in the world, but its standard installer won’t work if you are not connected to the Internet or are having trouble connecting to Google’s servers. In these situations, you can download a Google Chrome offline installer that contains all the files it needs to get the browser installed. These types of installers have their advantages as they can be downloaded from a machine with Internet connectivity and then used to install the browser on other devices you are setting up for the first time.
Source: https://www.bleepingcomputer.com/news/google/how-to-download-google-chromes-offline-installer/