List Builder is the easiest way to double your email subscribers. A lightbox that integrates with MailChimp, Campaign Monitor, Constant Contact.
If you don't have a Social Intents account, you can sign up right from the widget.
In the admin section of your WordPress site, click 'plugins' and then 'add new'
Search for 'Email List Builder by Social Intents'
Click 'Install Now'
After Installation, enter your widget key or Register for a new Account.