More clear WordPress README

Author: bshaffer

appengine/wordpress/README.md

@@ -1,11 +1,11 @@
 # WordPress for Google App Engine
 
-Samples for deploying WordPress to App Engine.
+This is a list of samples which contain a CLI tool for deploying WordPress to App Engine.
 
 ## Index
 
 |Runtime|Description|
 |---|---|
-|[php72](../php72/wordpress)| Sample and CLI tool for deploying WordPress to App Engine for PHP 7.2 (**recommended**)|
-|[flexible](../flexible/wordpress)|Sample and CLI tool for deploying WordPress to App Engine Flexible|
-|[php55](../php55/wordpress)| Sample and CLI tool for deploying WordPress to App Engine for PHP 5.5 (*deprecated*)|
+|[App Engine Standard for PHP 7.2](../php72/wordpress) (**Recommended!**)|The latest App Engine Runtime, and the latest version of PHP!|
+|[App Engine Flexible Environment](../flexible/wordpress)|Longer deployments, but allows for custom containers using Docker. Use this only if you're certain you need these features.|
+|[App Engine Standard for PHP 5.5](../php55/wordpress)|PHP 5.5 is EOL, so use only to maintain existing deployments.|