Website standards are not a single standard, but a collection of several standards. Web pages are primarily composed of three parts: Structure, Presentation, and Behavior. For website visitors, websites that adhere to web standards offer the following advantages: faster file downloads and page display speeds; content is accessible to more users (including blind individuals, those with weak vision, color blindness, and other disabled persons); content can be accessed by a wider range of devices (including screen readers, handheld devices, search bots, printers, refrigerators, etc.); users can customize their presentation interface via style selection; all pages can provide a print-friendly version... For website owners, there are also numerous benefits: less code and components, making maintenance easier; reduced bandwidth requirements (due to more concise code), lowering costs; easier indexing by search engines; convenient redesigns without altering page content; providing print versions without duplicating content; enhancing website usability...