The latest survey of advertising trends conducted by eMarketer has indicated that the amount of advertising spent on social networks will top $23bn in 2015, a whopping 33.5% increase on the year before. What’s more this growth rate is expected to continue through to 2017 when the sector will account for £36bn in sales, accounting for 16% of total global ad spend. Dominating social media spend are North America, Asia-Pacific and Western Europe where spend will hit $10bn, $7.4bn and $4.74bn.