Plugins are a great way to add useful features such as visitor statistics, entry forms, social media add-ons etc. The number of plugins available for any WorrdPress site is growing on a daily basis and makes managing and running a website much easier by simply downloading, installing and activating a plugin for a specific task you want it to do.
Some of the most popular include Contact Form 7, W3 Total Cache, various SEO and security plugins. Some are free of charge and some come with small fees.
The reason for the popularity of WordPress plugins? Ease of use. All one has to do is visit wordpress.com for the list of plugins available and download as many plugins as desired with all the bells-and-whistles that come with each plugin to make any WordPress site more user friendly, more eye catching, more search engine friendly etc. etc. With all these extras available for WordPress sites, what could go wrong?