Kirby meta tags snippet for better SEO

Meta tags are snippets of HTML code capable of being crawled by search engine robots such as Google. Invisible to site visitors, if handled skilfully they can have a huge effect on SEO. Google can use this information to create rich snippets or enable sorting of search results.

This is example code I use for Kirby websites:

<link rel="canonical" href="<?php echo html($page->url()) ?>" />
    <?php if($page->isHomepage()): ?>
      <title><?php echo html($site->title()) ?></title>
    <?php else: ?>
      <title><?php echo $page->title()->html() ?> | <?php echo $site->title()->html() ?></title>
    <?php endif ?>

    <?php if($page->isHomepage()): ?>
    <meta name="description" content="<?php echo $site->description()->html() ?>">
    <?php else: ?>
    <meta name="description" content="<?php echo $page->text()->excerpt(140) ?>">
    <?php endif ?>

    <meta name="publisher" content="<?php echo html($site->author()) ?>" />
    <meta name="copyright" content="<?php echo html($site->author()) ?>" />
    <meta name="robots" content="index,follow" />
    <?php if($page->isHomepage()): ?>
    <meta property="og:title" content="<?php echo html($site->title()) ?>" />
    <?php else: ?>
    <meta property="og:title" content="<?php echo html($page->title()) ?> | <?php echo html($site->title()) ?>" />
    <?php endif ?>
    <?php if($page->isHomepage()): ?>
    <meta property="og:type" content="website" />
    <?php else: ?>
    <meta property="og:type" content="article" />
    <?php endif ?>
    <meta property="og:url" content="<?php echo html($site->url()) ?>" />
    <meta property="og:image" content="<?php echo url('assets/images/image.png') ?>" />

    <?php if($page->isHomepage()): ?>
    <meta property="og:description" content="<?php echo html($site->description()) ?>" /><?php else: ?>
    <meta property="og:description" content="<?php echo html($page->text()->excerpt(140)) ?>
    <?php endif ?>

    <?php if($page->isHomepage()): ?>
    <meta itemprop="name" content="<?php echo html($site->title()) ?>">
    <?php else: ?>
    <meta itemprop="name" content="<?php echo html($page->title()) ?> | <?php echo html($site->title()) ?>">
    <?php endif ?>
    <?php if($page->isHomepage()): ?>
    <meta itemprop="description" content="<?php echo html($site->description()) ?>">
    <?php else: ?>
    <meta itemprop="description" content="<?php echo html($page->text()->excerpt(140)) ?>">
    <?php endif ?>