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 used for the graphics, and the layout is pulled from the Modern Business theme. .
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Here’s the sample knowledge-base style layout:

Knowledge Base Categories

Getting started

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Navigation

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Single sourcing

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Formatting

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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 | remove: "/" }}">{% if page.title %}{{page.title}}{% else %}{{page.name}}{% endif %}</a></li>
{% endif %}
{% endfor %}
{% endfor %}
</ul>

Here’s the result:

Getting started pages:

Tags: special_layouts