01) Access your Administrative Panel www.yoursite.com/wp-admin

02) After Login click on Plugins

Plugins are tools to extend the functionality of WordPress.

This article contains a list of plugins by category, and links to other plugin repositories. The core of WordPress is designed to be lightweight, to maximize flexibility and minimize code bloat. Plugins offer custom functions and features so that each user can customize their site to their specific needs.

For instructions and information on downloading, installing, upgrading, troubleshooting and managing your WordPress Plugins, check out the plugin page in WordPress or on the developer page. If you want to develop your own plugin, there is a comprehensive list of features in Plugins Features.

WordPress Plugins are available from various sources. The "official" source for WordPress Plugins is:

Official Repository of WordPress Plugins
Not all WordPress Plugins are in the official repository. Try to search the web for "WordPress Plugin" and keywords for the type of functionality you are looking for.

The following plugins are included with the WordPress core distribution:

Akismet
Akismet checks your comments on the Akismet service to see if they are spam or not.
Hello Dolly
When enabled you will randomly see the letter "Hello, Dolly" in the upper right corner of your Admin Panel on each page except the Plugins panel.