Let me introduce to everyone the aspects of website usability to consider when creating a website. Everyone has a vague concept of usability. People can discuss in detail what kind of web site is user-friendly, intuitive and easy to use, or simply put, "usable." So what exactly does usability mean? First, consider utility. Two e-commerce sites selling books provide the same basic features. Both allow users to search or browse for books, read information about books, purchase books, and track their orders. If the two sites have the same basic features, we say they have the same utility. For sites that offer the same functionality, you may find it easier to do something on one site than on another. In this case, we say this site is more usable than others. Unfortunately, there is no consensus on what constitutes usability. Many people have tried to define the characteristics of usability. Rule: There is no absolute viewpoint on what constitutes a usable site. Usability can vary greatly depending on how users access the site. Even without considering differences among users, we will find that usability varies according to how users interact with the site. Usability also depends on the medium used; text content displayed on a screen is better with larger fonts, while smaller fonts are better when printed on paper. If you've ever tried to read a large amount of small font content online, you'll know how difficult it can be. People tend to find it easier to read the same information on paper. Experts believe that people read content on screens more slowly. In this case, whether the medium used is a screen or paper affects the usability of the content. For the Web, media including the network, browser, screen size, and technical factors such as HTML often significantly impact usability. Rule: Usability depends on the medium used. Usability also varies from site to site. The usability limitations of an entertainment site are different from those of a commercial site. Furthermore, users' familiarity with a site, the frequency with which they visit the site, and their purpose for using the site all influence their perception of the site's user-friendliness.