mikaela.github.io/_layouts/blog_by_tag.html

<h1>Articles by tag :{{ page.tag }}</h1>
<div>
  {% if site.tags[page.tag] %} {% for post in site.tags[page.tag] %}
  <a href="{{ post.url }}/">{{ post.title }}</a>
  {% endfor %} {% else %}
  <p>There are no posts for this tag.</p>
  {% endif %}
</div>