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Facebook reveals 2015's most talked-about topics on TODAY Show

A lot can happen in the course of a year, and 2015 was no exception.
/ Source: TODAY

There's arguably no better barometer for measuring global conversation over time than social media. And with more than 1 billion people active on its platform, Facebook is helping to lead that conversation.

The site's chief operating officer, Sheryl Sandberg, joined TODAY' Savannah Guthrie Wednesday morning to reveal its most talked-about moments of 2015 in an exclusive interview.

1. U.S. presidential election

2. November 13 attacks in Paris

3. Syrian civil war and refugee crisis

4. Nepal earthquakes

5. Greek debt crisis

6. Marriage equality

7. Fight against ISIS

8. Charlie Hebdo attack

9. Baltimore protests

10. Charleston shooting and flag debate

In addition to sharing its top 10 global moments, Facebook also revealed the most talked-about entertainers, movies and shows of 2015:

Entertainer: Ed Sheeran

TV Show: "Game of Thrones"

Movie: "Star Wars: The Force Awakens"

Athlete: Floyd Mayweather, Jr.

Game: FIFA 15