HTML, or HyperText Markup Language, is essential for building web pages. It structures content and allows browsers to render elements like text, images, and links properly.

HTML tags are commands enclosed in angle brackets (e.g., "div" and "img") that define the structure and behavior of elements on a webpage.

HTML provides the foundational structure for websites. It organizes content into elements that can be styled with CSS and enhanced with JavaScript for interactivity.

Semantic elements, such as "header," "footer," and "article," give meaning to content. They improve accessibility and SEO by helping search engines understand the page structure.

HTML structures content, while CSS is used to style and format it. For example, HTML creates headings, and CSS defines their color, size, and font type.

Yes, HTML can function alone, but the webpage will be plain and lack styling or interactive features, making it less engaging for users compared to modern websites.

Inline elements flow with text, block elements occupy full width and begin on new lines, and inline-block elements allow width/height control while flowing with content.

HTML improves SEO by using semantic tags, structured headings, alt text for images, and meta tags, enhancing accessibility, readability, and search engine ranking.