Firstly go to setting module and click on addons
after that click on enable get response
Personalized marketing tools for who you are. Helping you to achieve your business goals. Powerful, simplified tool to send emails, create pages and automate your marketing. 99% email deliverability. Perfect timing. Scalable pricing. Responsive design.
Now, you just have to fill up the API key and API UTL ,Campaign Id after that click on SAVE button.