Sematic html involves using HTML elements that carry meaning about structure and content of a web page. Sematic html plays a crucial role in both SEO(Search Engine Optimisation) and accessibility and here is why;

Search Engine Optimisation(SEO)

• Search Engine Understanding: Search engines use algorithms to understand and index the content of web pages. Semantic HTML provides clear signals to search engines about the structure and hierarchy of the content, making it easier for them to comprehend and rank the page appropriately.

• Relevance and Priority: Semantic elements like <header>, <nav>, <article>, <section>, and <footer> help search engines understand the relevance and priority of different sections of your content. This can positively impact your search rankings by indicating the importance of certain content over others.

• Structured Data: Semantic HTML is the foundation for implementing structured data markup . This structured data provides additional context about your content, helping search engines display more informative and visually appealing results.

Accessibility

• Screen Readers and Assistive Technologies: Semantic HTML improves the experience for users with disabilities, particularly those using screen readers and other assistive technologies. These tools rely on the semantic structure of the page to provide a meaningful and well-organized representation of the content.

• Navigation and Keyboard Users: Semantic HTML aids in creating a logical and accessible navigation structure. Keyboard users, who navigate without a mouse, can benefit from properly structured HTML to move through a page in a meaningful and efficient way.

• Focus and Interaction: Semantic elements like <button> and <input> with appropriate attributes ensure that interactive elements are properly identified. This is crucial for users who rely on keyboard navigation or other assistive technologies to interact with your website.

In summary, semantic HTML is not only beneficial for search engines in understanding and ranking your content but also plays a vital role in creating a more accessible and inclusive web experience for users with diverse needs and abilities. By using semantic HTML, you contribute to a better overall web experience, improving both SEO and accessibility.