Social media: What the platforms are for and how they work
CNN Business · Tiffany Baker, CNN

For years, it felt like the social media landscape didn’t change much.

New apps came, new apps went, and the last one to really make a dent in the market was TikTok back in 2020.

But in the nine months since billionaire Elon Musk bought Twitter, there has been a flurry of activity — multiple copycat apps have been released as users seek an alternative as the bird app changes under new leadership. The latest rival, Threads, was launched by Facebook-parent Meta and got a stunning start earlier this month.

CNN broke down some of the biggest and buzziest social media platforms — how they work, who they’re for and who runs them.

Facebook … when you’re looking for community (or used furniture)

With more than 2 billion daily users around the world, it’s tricky to describe the stereotypical Facebook user. Some come for Facebook Marketplace, which lets users buy and sell everything from vintage furniture to used cars. Many others come looking for community — whether that’s photo updates from their great aunt’s bridge night, or online groups dedicated to new parents or people navigating health challenges. But some of those communities have created serious issues, including groups that have spread vaccine misinformation or those that used the platform to help organize the January 6, 2021, US Capitol attack.

Instagram … when you’re looking to feel envious

What started as a photo-sharing app for friends has morphed into a place where the goal is apparently to try to make yourself look hotter, more fun and more well-traveled than everyone else. Whether you’re looking at “lifestyle” tips from influencers, sponsored fashion or home décor content or photos from your high school crush’s summer Italy trip — it’s all there. That culture can make the platform fun and inspirational, but it’s also raised concerns about the app’s impact on users’ mental health, especially for young girls.

Pinterest … when you’re looking for inspiration

Pinterest lets users easily search for and organize visual-heavy inspiration on a wide range of creative topics. Planting a garden? Planning a wedding? Renovating an old home by hand? This is the platform for you. Pinterest has also been rolling out features to let users shop directly from their feeds.

TikTok … when you’re looking for entertainment

TikTok is no longer just an app for dancing teens, but many people still scroll (and scroll, and scroll) the shortform video app when they’re looking to be entertained. The platform serves up zippy videos on everything from news and book recommendations to comedy and “get ready with me” style makeup tutorials, and sometimes content about conspiracy theories or solving crime.