After a WordPress plugin has been approved and added to the SVN depository, you may want to modify the WordPress plugin. Modifying the plugin is quite simple. You simply edit the files for which are connected to the WordPress SVN. After modification, you change the information header to the new WordPress plugin version, change readme.txt version and recommit the files to the SVN. Then, you create the tagged version for which you send files into the tags folder with the new version.
The benefits of updating a WordPress plugins are plentiful. Not only is it improved, but, it will be placed higher on the list for its tags. For example, if the readme.txt file has various tags for your plugin; such as mp3 player, it would crawl back to the top for those tags since WordPress tags are ordered by date descending.