The most important moments on Facebook and Twitter in 2015

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2015 was a huge year for social media. #BlackLivesMatter, #LoveWins, One Direction, and Donald Trump, were just some of the most talked about topics and personalities this year. 

Then there were the moments that social networks helped bring us together, like when Facebook enabled its safety check feature so people could tell their loved ones they're safe after the terrorist attacks in Paris and bombing in Nigeria.

Facebook and Twitter released the most popular topics on social media in 2015:

The 2016 presidential race dominated discussion on Facebook and Twitter.

Barack Obama was the most talked about politician on Facebook, followed by Donald Trump, Brazilian president Dilma Rousseff, and Hilary Clinton.

The top politics-related hashtag on Twitter was #TCOT, which stands for "top conservatives on Twitter."

Millions of people changed their profile pictures in support of the people of Paris after the deadly November 13 attacks.

Hours after the tragic terrorist attacks occurred in Paris last month, millions of people started changing their Facebook profile pictures to show an overlay of the French flag.

Facebook also turned on its safety check feature so that people near the attacks could quickly tell their friends they weren't harmed.

The hashtag #PrayForParis and became a top global trend on Twitter, while Parisians used #PortOuverte to offer shelter in the city. People also shared the now-iconic #PeaceofParis symbol on Instagram to show support.

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The hashtag #JeSuisCharlie was used as a sign of solidarity and free speech after the deadly Charlie Hebdo attack in Paris.