HTML5 introduced several semantic elements that are integral to semantic HTML. Elements like <header>, <footer>, <article>, <section>, and <nav> provide meaningful structure to web content, making it easier for both developers and browsers to understand the content's purpose.

Semantic HTML plays a crucial role in enhancing content accessibility. By using meaningful tags, developers ensure that assistive technologies, such as screen readers, can correctly interpret and navigate the webpage, providing a better experience for users with disabilities.

Accessible Rich Internet Applications (ARIA) landmarks are used in conjunction with semantic HTML to further improve accessibility. ARIA landmarks provide additional context to assistive technologies, helping users navigate complex web pages more efficiently.

Screen readers rely heavily on the semantic structure of web content. Using semantic HTML ensures that screen readers can accurately convey the meaning and structure of the content to visually impaired users, enhancing their browsing experience.

Semantic HTML aids in search engine optimization by providing clear and descriptive tags that search engines can easily interpret. This helps in better indexing and ranking of the webpage, making the content more discoverable to users.

The adoption of semantic HTML is considered a best practice in modern web development. It contributes to creating cleaner, more maintainable codebases and enhances the overall web experience for all users.