Twitter shows how it shaped debate in 2015 with tweet round-up

As the world’s quickfire social network, Twitter is often the first point of call for many news stories and it has summarised its impact with a round-up of the year’s most iconic tweets.

With 2015 also serving as a year of change for the site with Jack Dorsey taking up the mantle of chief executive, pushing through a number changes to the product including heart likes, polls and its Moments video ad package.

It has shared the hashtags which shaped discourse throughout the year, showing how vital the service was.

#ParisAttacks

#BlackLivesMatter

#MarriageEquality

#RefugeesWelcome

#IStandWithAhmed

#FIFAWWC

#PlutoFlyby

#TheDress

Caitlyn Jenner joins Twitter

Social media users are also encouraged to share their top moments of 2015 using the #YearOnTwitter hashtag.

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