Since then, it has become a global phenomenon, with people celebrating around the world -- online and in person -- to share their love of all things social.
But what is social media anyway? It's broader than you think. It encompasses the obvious things like Facebook, Twitter, and Snapchat -- but also Tumblr, Youtube, Instagram, and even podcasts.
It's probably easier to define it by what it isn't (television, radio, or newspapers, for example) than by what it is. There are so many options that while people used to attempt to master all the types of media, today it's more common to pick only one medium and corner that.
For this year's Social Media Day, I've gathered a few experts in my hometown of Las Vegas to give their unique perspective of what will give your social media a boost. Here are their top four tips:
1. Stay on target.
Krista Whitley is the CEO of Social Media Unicorn, a marketing and sales agency for cannabis businesses. She stresses that you need to clearly define your targets.
"Often clients can become distracted by metrics that aren't applicable to their goals," Whitley says. "So suddenly they're upset that their Facebook audience isn't growing dramatically when the goal is lead generation and our team is exceeding the lead generation goal."
2. Say it in memes.
Warren Whitlock, host of the Social Media Radio show and a bestselling author, believes that you need to stand out.
"Today, more than ever, it's vital that you distil your message into a short meme that can be shared," Whitlock says.
To be clear, this doesn't mean every post should be a cat picture. Just make sure your message is, as Whitlock explains, "a sound byte version that is consistent and repeatable."
3. Make a connection.
Cat Goldberg, founder of "neuromarketing" company Brainbuzz, tries to get inside the heads of her audiences -- in combination with blogs and videos to understand customer needs better.
"Social media allows you to be in front of your target customer's eyes while also engaging them in conversation," Goldberg says. "This authentic connection will make them more curious about you."
4. The customer is everything.
Steve Wiideman, an SEO expert and president of the Wiideman Consulting Group, says that the essential things are the most basic. "The most important lesson that I've learned is to listen," he explains. "Listen to reviews, opinions, blog commentary, tags used, interpretation, hashtags, and anything else your patrons and prospects might be saying about you, your industry and your products."
Whatever your main platform for social media, with these tips you're guaranteed to have a great social media day!