W3 Total Cache improves the user experience of your blog by improving your server performance, caching every aspect of your site, reducing the download time of your theme and providing transparent content delivery network (CDN) integration.

Most of the popular cache plugins available do a great job and serve their purpose very well. W3 Total Cache plugin remedies numerous performance reducing aspects of any web site going far beyond merely reducing CPU usage (load) and bandwidth consumption for HTML pages alone. Equally important, the plugin requires no theme modifications, modifications to your .htaccess (mod_rewrite rules) or programming compromises to reap the benefits. Setup is easy.

Speed is among the most significant success factors web sites face. In fact, your blog’s speed directly affects your income (revenue) — it’s a fact. Some high traffic sites conducted some research and uncovered the following:

• Google.com: +500 ms (speed decrease) -> -20% traffic loss
• Yahoo.com: +400 ms (speed decrease) -> -5-9% full-page traffic loss (visitor left before the page finished loading)
• Amazon.com: +100 ms (speed decrease) -> -1% sales loss

A thousandth of a second is not a long time, yet the impact is quite significant. Even if you’re not a large company (or just hope to become one), a loss is still a loss.

Pricing: Free
Requirements: WordPress 2.5+
Source: http://wordpress.org/extend/plugins/w3-total-cache/