Google Analytics are the set of codes which help google to analyze your posts.
For WP, you can download Google Analytics from the following link
http://wordpress.org/extend/plugins/google-analytics-for-wordpress/
- Go to Plugins and Click Add New
- Click Upload to upload the new plugin
- Click on Activate Plugin
- Initially it will not authenticate with Google Analytics, so click on the provided link to authenticate it
- Click on Click here to authenticate with Google
- Click Grant Access
- Or Select Manually and Paste the code “UA-17417867-1”
- Select the appropriate Settings and Click Update Google Analytics Settings