“Plugins can extend WordPress to do almost anything you can imagine”
- Wordpress.org

1. In your  WordPress go to plugins>add new.
2. Where say  “search” write the plugin that you want and search it. Ex. Contact form 7
3. Click in install>install now.
4. Then in Activate Plugin.
5. You’re done !.

You can Install any plugins with no limit (I have 25)
Each plugin are diferent, so if you need more support visit the plugin directory