Learning how to create a bookmark or add to favorites is a very wise thing. This is especially true if you use the Internet for any of the reasons described below. These are not the only reasons why knowing how to do this is important, but they are the most common ones.
When you add to favorites, you always have those bookmarks, at least until you decide to delete them. Say you are shopping online and you find something really cool to buy, but you still want to look around on other websites for the same product at a better price or with better features. All you do is bookmark this page, essentially saving it, and then go to other websites until you find what you are looking for. Then you can refer back to the bookmarked page when you have shopped around enough.
You can add to favorites for other reasons as well. Say you are working on a research project and are using the Internet to conduct most of this research to complement what you find in a library or through books. You can add to favorites the pages that will work most with your research, so you are referring back to them whenever you need to reference them. In doing so, you save on paper and the environment by avoiding having to print this stuff out and highlight it in hard copy too.
You can add to favorites the sites that you normally visit as well. If you use the web like a lot of people, then you have a certain format that you follow each morning to get your news or to check your email or do other stuff like check your checking account for your daily balance. In using HTML bookmarks to keep on your computer the sites you normally visit, you avoid having to plug in these URLs every morning when you do your check. This saves a good deal of time, but more importantly it keeps you in line so you do not forget about certain sites or pages.
You can add to favorites through the bookmarks Google lets you have too, which allows you to save bookmarks to one computer and then have them accessed via other devices too. Most every bookmark Google allows its users to save is accessible via multiple devices, giving you more freedom to bookmark the pages you like and the peace of mind to know that your bookmarks will always be saved and can always be accessed.