give example use cases

readme.md

@@ -1,19 +1,13 @@
 ## PostgreSQL for WordPress (PG4WP) 
 
-### Contributors
-Code originally by Hawk__ (http://www.hawkix.net/)
-Modifications by @kevinoid and @mattbucci
-
-PostgreSQL for WordPress is a special 'plugin' enabling WordPress to be used with a PostgreSQL database.
-
 ### Description 
 
 PostgreSQL for WordPress (PG4WP) gives you the possibility to install and use WordPress with a PostgreSQL database as a backend.
-It works by replacing calls to MySQL specific functions with generic calls that maps them to another database functions and rewriting SQL queries on the fly when needed.
 
-If you want to use this plugin, you should be aware of the following :
+#### Use Cases
-- WordPress with PG4WP is expected to be slower than the original WordPress with MySQL because PG4WP does much SQL rewriting for any page view
+
-- Some WordPress plugins should work 'out of the box' but many plugins won't because they would need specific code in PG4WP
+- Run Wordpress on your Existing Postgres Cluster
+- Run Wordpress with Georeplication with a Multi-Active Postgres instalation such as EDB Postgres Distributed, or CockroachDB for a more resiliant Wordpress Infrastructure 
 
 ### Design
 
@@ -86,3 +80,7 @@ If you find a failing scenario please add a test for it, A PR which fixes a scen
 PG4WP is provided "as-is" with no warranty in the hope it can be useful.
 
 PG4WP is licensed under the [GNU GPL](http://www.gnu.org/licenses/gpl.html "GNU GPL") v2 or any newer version at your choice.
+
+### Contributors
+Code originally by Hawk__ (http://www.hawkix.net/)
+Modifications by @kevinoid and @mattbucci