If you want to review some essential concepts about how the World Wide Web works, or web browsing, you may find these brief, free web tutorials very helpful:
Internet Basics (GCF Global)
https://edu.gcfglobal.org/en/internetbasics/
Some of the topics covered in this tutorial include:
- Essential web navigation concepts and terminology
- Common web browser features and usage
- Tips to help organise your email and favourite web sites, using folders, bookmarks and junkmail protection
- Staying secure online: what to look out for.
Internet Basics: Using a Web Browser
http://www.gcflearnfree.org/internetbasics/using-a-web-browser/1/
A brief review of common concepts and methods related to using a web browser - in this case, Google Chrome, but many ideas are the same in Mozilla Firefox or Internet Explorer.