This plugin enables centralized management of all modules to do SEO (Search Engine Optimizations) sitemap, friendly URLs, canonical URLs, robots.txt, ...
The friendly URLs module lets you create nicer URL for any resource of your site.
For example the technical URL :
http://mysite/jsp/site/Portal.jsp?page_id=122
can be accessible with a much more friendly URL
http://mysite/pages/my_topic.html
The Sitemap module lets you create and generate a Sitemap file that contains all the page of your site to do a better search indexing.
The robot.txt module lets you manage the file that will indicate to bots how to navigate in your site
The URL rewriting module lets you create rules to redirect automatically URL to another.
For example the URL :
http://mysite/app/wiki
can be redirected to
http://mysite/jsp/site/Portal.jsp?page=wiki