It is an SEO and SEF component for Joomla!
EditByBSEditor: This component for SEO (Search Engine Optimization) will rewrite your Joomla! URLs not to be only Search Engine Friendly (SEF), but also to be human easily understandable. Provides support for multilingual sites using JoomFish. Enables full customization of wide-range of meta tags for any URL in your site! Works with both with Apache and IIS. May be easily updated on-line.
What is new in 3.2.11
New - Free extension for SectionEx
Fix - FImproved 3rd party extension compatibility

Features:
rewrites original Joomla! URLs to be Search Engine Friendly (SEF) and human understandable
improves your overall Joomla site SEO rating
provides support for multilingual sites using JoomFish
URLs internationalization (translated URLs)
support for multiple formats of URLs when using multiple languages - domain based: en.yoursite.com, de.yoursite.com, ... or path-based: yoursite.com/en, yoursite.com/de
wide range of editable meta-tags for any URL in your Joomla!
fully customizable URLs, many configuration options for automatic URL generation
customizable 404 page
helps you handle 301 redirects, allow custom 301 redirect definitions
support for Google News URL format
works with Apache and IIS, platform Independent
online free! updates (free updates also for the PAID versions)
caching system for improved performance
modularity - supports 3rd party modules
adjustable parameters for add-on extensions to customize way of URL appearance
plug-in system - easily add more extensions for your components
support for sef_ext.PHP files written for OpenSEF or SEF Advance (since v1.4.0)
Joomla 1.0.x (JoomSEF 2) and 1.5 support (JoomSEF 3) you can free download ARTIO JoomSEF 3.3.1 now.