MetaSlider is the most popular free slider at WordPress.org with 900,000+ active installations. But is it the best free slider plugin for WordPress? Interestingly, Smart Slider 3, which I recently found was the best premium slider plugin for WordPress in a recent comparison test, is the second most popular free plugin in the repository with 200,000 active installations. So… what’s so great about MetaSlider that 700,000 people prefer it over Smart Slider 3? Having never used MetaSlider before, I was determined to find out.