Optimized structure (Sngine-style)
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>{$page_title|truncate:60}</title>
<meta name="description" content="{$page_description|truncate:160}">
<link rel="canonical" href="https://example.com/page" />
<meta name="robots" content="index,follow" />
<!-- Open Graph -->
<meta property="og:title" content="{$page_title}" />
<meta property="og:description" content="{$page_description}" />
<meta property="og:image" content="{$page_image}" />
<meta property="og:url" content="https://example.com/page" />
<meta property="og:type" content="website" />
<!-- Twitter -->
<meta name="twitter:card" content="summary_large_image" />
<meta name="twitter:title" content="{$page_title}" />
<meta name="twitter:description" content="{$page_description}" />
<meta name="twitter:image" content="{$page_image}" />
</head>