Mail chimp has been an app that we have been recently using. The intended use was for an email blast and it gives you the chance to design the emails as you wish. It can also be integrated with an e-commerce website such as WordPress and Wix. You can create signup forms to gain an audience and boost sales. Mail chimp can also create ads for social media like Facebook and Instagram. It is also easier to create a campaign with their intuitive design tools and beautiful vibrant modern templates. Overall Mailchimp is the leading marketing and email system used and with proper backing.