This shows a sample layout for a knowledge base. Each square could link to a tag archive page. In this example, font icons from Font Awesome are enlarged to a large size. You can also add captions below each icon.
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Generating a list of all pages with a certain tag
If you don't want to link to a tag archive index, but instead want to list all pages that have a certain tag, you could use this code:
Getting started pages:
<ul>
{% assign sorted_pages = (site.pages | sort: 'title') %}
{% for page in sorted_pages %}
{% for tag in page.tags %}
{% if tag == "getting-started" %}
<li><a href="{{page.url | replace: '/',''}}">{{page.title}}</a></li>
{% endif %}
{% endfor %}
{% endfor %}
</ul>
Getting started pages: