The easiest way to do this is to just cut and paste this code.
sudo apt install curl software-properties-common apt-transport-https ca-certificates -y
curl -fSsL <https://dl.google.com/linux/linux_signing_key.pub> | gpg --dearmor | sudo tee /usr/share/keyrings/google-chrome.gpg > /dev/null
import Google Chrome into the APT repository (it wasn't included w/ ubuntu since it is the opposite of open source)
echo deb [arch=amd64 signed-by=/usr/share/keyrings/google-chrome.gpg] <http://dl.google.com/linux/chrome/deb/> stable main | sudo tee /etc/apt/sources.list.d/google-chrome.list
now update APT again
sudo apt update
and finally, you can install Chrome.
Now that it has been added to your APT repository you can install it like any other package. "Stable" at the end indicates that you want to download and install the stable branch of Chrome, not Beta or Development.
sudo apt install google-chrome-stable