In addition to customizing the look and feel of your blog, you can also choose to add plugins to your WordPress blog that will enhance your website and work as extensions of the blog software that can make your blog more interactive as well as easier to manage.
In order to put these plugins to work for you, you simply download them from the developers website and upload them into your wp-content/plugins in the same way that you uploaded your themes.
And just like a theme, you need to activate each plugin from within your WordPress admin center before it becomes active and visible on your blog.
Sometimes a plugin will require more than just activating it. For example, a popular plugin that helps blogs do better in the search engines requires that you configure the settings before using it.
If ever a plugin requires additional information in order to function properly, you will see a new link appear in your navigation menu (from within the “Plugins” area) that will give you more information about that specific plugin.
One example of a useful plugin is found at http://www.wpeasier.com .Plugins are exceptionally useful, especially when optimizing your website for the search engines. You can find here the best plugin according to need your site.