#BBCtrending: Five facts about #BringBackOurGirls

The hashtag #BringbackourGirls has become a huge global phenomenon after the abduction of more than 200 schoolgirls in Nigeria. Here are five facts about the trend.

1. When did it start?

Image copyright Reuters

2. How many times has it been used on Twitter?

Image copyright AP

3. Where is it being used?

Image copyright Getty Images

4. Who is using it?

Image copyright Reuters

5. Most shared tweet?

Image copyright Twitter @FLOTUS

Images courtesy of Getty Images, Reuters, AP and @FLOTUS/Twitter

All our stories are at bbc.com/trending