Social media marketing has been hailed as one of the most effective tools currently available to British businesses,silobreaker.com reports. A new report conducted by the Internet Advertising Bureau UK (IAB UK), found that social media marketing can demonstrably improve brand sentiment, customer engagement and brand loyalty. Furthermore, where the bottom line is concerned, it can drive ROI of more than 3:1 – or put more simply, every £1 spent on social media can typically generate £3.34 value in return.