Memcached is a distributed memory object caching platform, which is used to boost the load speed of database-driven Internet sites by caching the queries and the replies between the visitor and the server. Put simply, every time a given web page on such a site is visited, the script sends a query to its database to get the info that should be displayed to the website visitor. If the latter clicks a link to go to some other web page, the whole procedure is executed again and this results in a lot of database queries and high server load, especially if the website has a lot of simultaneous visitors. Memcached "remembers" this exchange of information, so if any of these web pages is visited again, the script no longer needs to cull any content from the database, since everything is provided by the Memcached platform. Thus, the overall speed of your website will increase and you’ll get more pleased visitors and they will be able to surf through your website faster. Moreover, the Memcached platform "refreshes" its cache every time any content in the database is altered, so the site users will never wind up seeing old data.