WordPress.org

See instruction video here: How to Install SEO Booster Lite.

or

1. Download the .zip file
2. Extract the zip-file, containing the folder "seo-booster"
3. Upload to your wp-content/plugins/ folder on your blog
4. Log in to your blog, go to the plugins page and look for "SEO Booster Lite" and activate the plugin
5. Go to your "Widgets" section under "Appearance" and look for and include the widget where you want to add it
6. Click the Widget to change the options
7. Remember to save changes to the Widget section!
8. Wait for your blog to get traffic from page two searches. This could take some time, or it can be really quick, depending on the amount of traffic your blog is getting.