![How to fake a trend on Twitter - BBC Trending 1 How to fake a trend on Twitter - BBC Trending](https://i.ytimg.com/vi/wb0DISwHMWc/hqdefault.jpg)
A BBC investigation has found Saudi Arabian companies offering to make hashtags trend artificially. Twitter says it’s trying hard to clamp down on automated accounts – or “bots”.
Reporters: Jonathan Griffin and Fahima Abdulrahman
Video journalist: Alex Dackevych