<head>
The container for machine-readable metadata: title, charset, viewport, links, and structured data.
Baseline: Widely available · Document structure
When to use it
Once per document; put charset within the first 1024 bytes and the title early.
When not to
Don't put renderable content here — browsers will relocate it into body and your document becomes invalid.
Example
<head>
<meta charset='utf-8'>
<title>Page title</title>
</head>