What is the main benefit of using bookmarks in a web browser?

The main benefit of using bookmarks in a web browser is that they provide direct access to frequently visited sites. Bookmarks allow users to save and organize their favorite webpages, enabling quick and convenient retrieval without having to remember or type long URLs each time. This streamlined access enhances the efficiency of online navigation and saves time, especially for users who regularly visit specific sites for tasks like research, work, or leisure.

While the other options describe potential features or concepts related to web browsing, they do not accurately capture the primary purpose of bookmarks. For example, bookmarks do not enhance security, improve loading speed, or increase file storage, as their core function is centered around facilitating easy access to websites.