Salesforce marketing cloud makes marketing smarter and more revenue-yielding. It also provides marketers with 5 different channels with which an organization can reach to and interact with its customers. According to Research and Markets, the global retail sector is estimated to have achieved revenues of US$ 22.6 trillion in 2015 and should continue to rise to US$ 28 trillion by 2019, with an average annual growth rate of 3.8% since 2008.