Update usage of description from config, close #3291

Author: rjzupkoii

_config.yml

@@ -12,8 +12,9 @@ site_theme               : "default" # Currently available options are "default"
 title                    : "Your Name / Site Title"
 title_separator          : "-"
 name                     : &name "Your Name"
-description              : &description "personal description"
-url                      : https://academicpages.github.io # the base hostname & protocol for your site e.g. "https://[your GitHub username].github.io" or if you already have some other page hosted on Github then use "https://[your GitHub username].github.io/[Your Repo Name]"
+description              : &description "Your Name's academic portfolio"   # Update this with a general description of your site, this is the default if not overridden by a page
+url                      : https://academicpages.github.io # The base hostname & protocol for your site e.g. "https://[your GitHub username].github.io",
+                                                           # or if you already have some other page hosted on Github then use "https://[your GitHub username].github.io/[Your Repo Name]"
 baseurl                  : "" # the subpath of your site, e.g. "/blog"
 repository               : "academicpages/academicpages.github.io"
 
@@ -88,7 +89,7 @@ publication_category:
     title: 'Conference Papers'
 
 # Site Settings
-teaser                   :  # filename of teaser fallback teaser image placed in /images/, .e.g. "500x300.png"
+teaser                   :  # filename of teaser fallback teaser image placed in /images/ for social media previews
 breadcrumbs              : false # true, false (default)
 words_per_minute         : 160
 future                   : true

_includes/seo.html

@@ -24,6 +24,7 @@
 {% if seo_description %}
   {% assign seo_description = seo_description | markdownify | strip_html | strip_newlines | escape_once %}
 {% endif %}
+<meta name="description" content="{{ seo_description }}">
 
 {% assign seo_author = page.author | default: page.author[0] | default: site.author[0] %}
 {% if seo_author %}