What is the main impact of using proper semantic HTML in Web development?

Using proper semantic HTML significantly enhances both search engine optimization (SEO) and accessibility. Semantic HTML refers to the use of HTML elements that convey meaning about the content they enclose, such as using header tags for titles, paragraph tags for text, and list tags for items. This practice helps search engines better understand the context of the content, improving the site's visibility in search results.

From an accessibility perspective, semantic HTML provides clear structure and meaning for assistive technologies, like screen readers, ensuring that users with disabilities can navigate the site more effectively. For instance, using the <nav> element for navigation links informs assistive technologies that these links are part of a navigation section, enhancing the user experience for individuals who rely on such tools.

This incorporation of meaningful markup leads to a more organized presentation of information, benefiting not just search engines but all users navigating the site, making it an essential aspect of modern web development.