Added intro to content registration page

Author: PhilReedData

TeSS_docs/_toc.yml

@@ -20,6 +20,7 @@ parts:
     - file: spaces/credit
   - caption: Content registration
     chapters:
+    - file: content/intro-content
     - file: content/auto
       sections:
       - file: content/auto-events

TeSS_docs/content/intro-content.md

@@ -0,0 +1,49 @@
+# Introduction to content registration
+
+Training resources (events and materials) may be added to TeSS to reach bigger audiences, increase impact and bolster event attendance. Registering events and training materials makes them more findable in a variety ways to various user bases.
+
+
+::::{grid} 1 1 2 3
+:class-container: text-center
+:gutter: 3
+
+:::{grid-item-card}
+... in TeSS
+^^^
+
+![events listing](../images/content/events_listing.png)
+
++++
+Be seen by thousands of visitors to our site
+:::
+
+
+:::{grid-item-card}
+... in search engines
+^^^
+
+![search results](../images/content/search_results.png)
+
++++
+Be seen in search results more owing to our search-engine optimisation
+:::
+
+
+
+:::{grid-item-card}
+... embedded in other sites
+^^^
+
+![widgets adopters](../images/content/widgets_adopters.png)
+
++++
+Be seen across all the websites that display site resources through our [widgets](../developers/code-data).
+:::
+
+::::
+
+
+There are two ways to register training materials or events for display in TeSS:
+
+1. Arrange for an [automatic registration](auto) solution;
+2. Use our form to register them [manually](manual).

TeSS_docs/images/content/events_listing.png

@@ -39,7 +39,7 @@ When to set up a TeSS space, how to credit other spaces' materials.
 :::
 
 :::{grid-item-card}
-:link: content/auto
+:link: content/intro-content
 :link-type: doc
 
 {fas}`box-open;sd-text-secondary` **Content**