Github Pages now have a dedicated SEO plugin to help you get noticed

If your blog or product landing page is using GitHub Pages, it can now be optimized for SEO.

By adding a simple {% seo %} to your site, GitHub will automatically add SEO metadata to each page. It even accounts for the page title, in addition to the description, canonical URL, next (and previous) URL and post metadata.

When you share a post to Facebook, LinkedIn, Twitter or other social networks, the tag makes sure content is displayed richly.

The functionality comes courtesy of the Jekyll SEO plugin, which GitHub says “provides a battle-tested template of crowdsourced best-practices.”