What is a “Browser”?

An internet browser, also known as a web browser or simply a browser, is a software program that lets you view web pages on your computer. You can think of your browser as your gateway to the internet. There are many different Browsers such as: Edge Firefox Chrome Brave to name a few...   They all allow you to "Browse the Internet" for your favorite items.

How do I keep track of all those passwords!

Use a password manager such as Bitwarden which is free and opensource.  (Opensource is also very secure because the code is constantly checked for any abnormalities).  I highly recommend adding an extension to your web browser to make it simple to access any website.