Nearly all of the Internet web browsers available today have a feature, which is like an automated address book. Some call it "Hot Listing", others call it "Book Marking" or "Favourites". In any case, the effect is the same. Bookmarking allows you to grab a copy of a URL (or the address) of the web page you wish to keep, and store it so that you can easily go back to the site at a future time.
To use a bookmark, open either the Bookmark (or Favorites) menu, and all the sites you have book marked in the past will be there. This is a very simple way of keeping all the addresses of the sites you found to be most interesting. You can be very adventurous and even start up files and folders of your bookmarks and sort them into order.