the user might receive pre-generated HTML from a web cache. Most open source WCMSs support add-ons that extended the system's capabilities. These include features like forums, blogs, wikis, web stores, photo galleries, and contact management. These are variously called modules, nodes, widgets, add-ons, or extensions. Hybrid processing Some systems combine the offline and online approaches. Some systems write out executable code (e.g., JSP, ASP, PHP, ColdFusion, or Perl pages) rather than just static HTML. That way, personnel don't have to deploy the WCMS itself on every web server. Other hybrids operate in either an online or offline mode. Advantages Low cost Some content management systems are free, such as Drupal, eZ Publish, TYPO3, Joomla, Zesty.io, and WordPress. Others may be affordable based on size subscriptions. Although subscriptions can be expensive, overall the cost of not having to hire full-time developers can lower the total costs. Plus software can be bought based on need for many WCMSs. Easy customization A universal layout is created, making pages have a similar theme and design without much code. Many WCMS tools use a drag and drop AJAX system for their design modes. It makes it easy for beginner users to create custom front-ends. Easy to use WCMSs accommodate non-technical people. Simplicity in design of the admin UI lets website content managers and other users update content without much training in coding or system maintenance. Workflow management WCMSs provide the facility to control how content is published, when it is published, and who publishes it. Some WCMSs allow administrators to set up rules for workflow management, guiding content managers through a series of steps required for each of their tasks. Good For SEO WCMS websites also accommodate search engine optimization (SEO). Content freshness helps, as some search engines prefer websites with newer content. Social media plugins help build a community around content. RSS feeds automatically generated by blogs, or WCMS websites can increase the number of subscribers and readers to a site. URL rewriting can be implemented easily—clean URLs without parameters further help in SEO. Some plugins specifically help with website SEO. Disadvantages Cost of implementations Larger scale implementations may require training, planning, and certifications. Certain WCMSs may require hardware installation. Commitment to the software is required on bigger investments. Commitment to training, developing, and upkeep are costs incurred in any enterprise system. Cost of maintenance Maintaining WCMSs may require license updates, upgrades, and hardware