Answer
`<!DOCTYPE html>` tells the browser to use modern HTML rules. • It is written at the very top of the file. • It helps browsers display the page in standards mode. • It is a declaration, not a normal HTML tag.
💡 Simple Example
<!DOCTYPE html>
<html lang="en">
<head><meta charset="utf-8"><title>Example</title></head>
<body><p>Hello</p></body>
</html>
⚡ Quick Revision
The doctype asks the browser to render the page using modern standards.