Shanghai has signed a historic agreement with media conglomerate Tencent, to turn the Chinese megapolis into a tech-enabled smart city. But within the futuristic plans is a familiar presence; the entire operation will run on China’s most popular social network, WeChat.

As technology and banking fuse, new quick and easy payment opportunities are emerging on social networks. One of France's largest banks, BPCE, is trialling a new service on Twitter that lets anyone transfer money simply with a tweet.

Only 0.6% of online shopping is driven by social media, compared to e-mail, which drives 27%. Can Facebook’s Buy button, integrated into newsfeeds, encourage people to spend more when they're on social media? And are retailers really welcome on such a personal platform?

When Facebook was launched, it felt defiantly 'young' - a fun place for young Millennials to waste time together. But fast forward to today, and the average user age has skyrocketed. As their parents start logging on, teens are abandoning ship. Has Facebook lost its cool?