Supply comes with the Jekyll SEO Tag plugin installed.
Jekyll SEO Tag adds metadata tags for search engines and social networks to better index and display your site’s content.
There are other ways to implement search engine optimisation with Jekyll, or you may not need this.
In case you would like to uninstall the plugin, here is how to do it:
Remove this line in your Gemfile: gem 'jekyll-seo-tag'.
In your default.html file in _layouts, remove line 20.
In your site’s _config.yml, remove
plugins:
- jekyll-seo-tag