Every valid HTML document follows a precise skeleton — a set of required elements in a specific order. Understanding this structure isn't just about following rules: it's about telling browsers, search engines, and assistive technology everything they need to know before rendering a single visible character.
1-A 2-B 3-A 4-A | 5 HTML5 6 head 7 = <!DOCTYPE html><html><head><title>...</title></head><body>...</body></html> 8 = Head = info about the page; body = what users see 9 = So special characters/emoji display correctly | 10 = In head - search engines show it in results