sh404SEF® is the most popular add-on for maximizing your Joomla SEO efforts and placement in search engine result pages. 

General features

• Most popular and longest developed Joomla SEO add-on
• New version notifications in backend
• Global parameters for extensions (lowercase URLs for example)
• Flexible character replacement or stripping
• Supports third-party SEF plugins via the standard Joomla installer including AceSEF and JoomSEF
• Flexible backend filtering system for efficient URL management
• Works with Apache and IIS, platform independent
• Caching system for improved performance (Joomla core compatible)
• Integrated Google Analytics including support for social sharing

Fix Joomla SEO problems instantly

• Instanly add global support for canonical URLs (add rel="canonical" HTTP headers)
• Remove duplicate URLs, a common problem with Joomla web sites
• Create human ear and search engine friendly (SEF) URLs
• Control URL re-write mode on a per-application basis
• View your Google Analytics dashboard in the Joomla administrative backend to keep a close eye on traffic volume and referral sites
• Support for Google News URL format
• Get the shortest, most significant urls for your site and your web rankings
• quickly and easily add social media buttons to your entire site to allow sharing on Twitter, Facebook, Google+ and Pinterest.
• monitor social sharing of your content in the Joomla administrative backend
• Adjustable parameters for add-on extensions to customize URL appearance per-extension
• Automatically generate tiny URLs (shURLs) for your content (formerly called pageID)
• Customize the page title and page description
• Automatically emphasize all your article titles with "Heading tags"
• Satisfy many of the Google recommendations for search engine optimization with just a few clicks
• Fully compatible with multi-language solutions for Joomla such as JoomFish (i.e. internationalization)
• Drive traffic to your site with auto-generated QR codes
• Automatically add previous and next HTML5 link types to your pagination links

Improvents in Site Useability

• Create customized error pages (i.e. 404) with relevant links and other info
• Add Heading tags to your articles
• Automatically indicate the links on your site that lead to external sites with a small icon
• Automatically convert table-based ouput of core Joomla extensions to the preferred tableless HTML
• Automatically detect mobile devices and switch templates

Security Improvements

• Harden against cross-site scripting attacks (XSS)
• Harden against malicious page requests
• Limit flooding attacks
• Protect input forms such as the contact page from spam (using Project Honey Pot)
• Control site access from suspicious domains (using IP address white listing and black listing)
• Prevent CMS identification via the 'meta generator' tag