svelte/documentation/docs/05-special-elements/04-svelte-head.md

title
<svelte:head>

<svelte:head>...</svelte:head>

This element makes it possible to insert elements into document.head. During server-side rendering, head content is exposed separately to the main body content.

As with <svelte:window>, <svelte:document> and <svelte:body>, this element may only appear at the top level of your component and must never be inside a block or element.

<svelte:head>
	<title>Hello world!</title>
	<meta name="description" content="This is where the description goes for SEO" />
</svelte:head>