TikTok explained: how the app became a global phenomenon

TikTok is one of the fastest-growing social media platforms of all time

Centered around user-generated short videos, the platform was created by the Chinese technology company ByteDance Ltd. With over 1.8 billion users, the app has become a global force.

How TikTok ate the internet

TikTok is now deeply integrated into American culture, thanks to the app’s powerful algorithm and focus on entertainment which have influenced popular trends and social media content consumption in the US. This immersive piece highlights TikTok’s role in helping shape everything from music to fashion and even politics in the US—while its connection to China has also drawn scrutiny and raised national security concerns.

A timeline and visuals on TikTok's rapid growth

The app that would become TikTok is known as Douyin in China, and this article recounts its history, acquisition of rival Musical.ly, and rebranding ahead of its lightning growth. One visualization shows how quickly TikTok reached 1B users.

TikTok boasts nearly 1.8B monthly users

The app has surged in popularity recently, with usage surging during the COVID-19 pandemic. Those users have generated high revenues, too, with over $23B in 2024.

TikTok can turn everyday users into stars

TikTok is such a cultural force, it’s now a platform for turning ordinary users into stars. This "Planet Money" podcast episode performs a deep dive into how Tai Verdes went from working a day job and dreaming of becoming a successful musician to using TikTok to gain a following.

Less than half of TikTok's US users have posted a video

Like most platforms, content is driven by a small number of active users—in TikTok's case, 25% of accounts are responsible for an estimated 98% of content posted.

TikTok CEO Shou Zi Chew on its future

TikTok CEO Shou Zi Chew dives into how the trendsetting video app and cultural phenomenon works, from what distinguishes its algorithm and drives viral videos, to the challenges of content moderation and digital addiction in this wide-ranging conversation with the head of TED, Chris Anderson.

TikTok's personalized algorithm activates the brain's reward system

A 2025 Washington Post study found that 75% of the TikTok users it studied nearly doubled their time spent on the app within a month. Experts in design and psychiatry say this is due to the app's interface and algorithm, which, after learning about the user's preferences, recommend videos more likely to activate that person's dopamine reward system than non-personalized suggestions.

Understanding TikTok-owner ByteDance's business model

ByteDance has ridden TikTok's major success to become the world's most valuable startup. This deep dive showcases some of the company's smartest moves and tactics, and where it's headed next.

TikTok is transforming the English language

Linguists like Adam Aleksic have argued that the way internet slang—especially the kind that thrives on TikTok—enters the real world isn’t so different from how English evolved in its earliest days.

TikTok's 'sonic logo' imprints the app's identity across platforms

As the app's popular videos spread to other platforms like Instagram and Reddit, the company sought a way to alert viewers that the content originated on TikTok. They decided on the sonic logo that now acts as a bumper on all of its shared videos, to attract users.

How to read the news on TikTok

There's plenty of news on TikTok, but that doesn't mean it's all reliable. This guide, written by a communication technology professor, breaks down the ways the app's algorithm delivers news. It also covers how users can determine whether or not a story is factual or misleading. Most strikingly, the professor warns readers that if they didn't search for a TikTok video, then "it probably found you."

TikTok isn’t factored into a song’s rank on the Billboard charts, but it can have an impact

Billboard ranks a song’s chart position based on its radio airplay, its physical sales, and its streaming numbers (across Spotify and other platforms), but doesn’t include user-generated content, meaning it doesn’t include TikTok videos. Keith Caulfield, Billboard’s managing director of charts and data operations, notes that TikTok still has an impact, though, because listeners will often stream the app’s most popular songs on other platforms.

What Trump's second 75-day extension means for TikTok sale

After President Trump took office in January 2025, he offered TikTok the opportunity to find a US company to buy the app within 75 days. In the meantime, the app continued operating. In April, Trump extended that deadline by an additional 75 days. This BBC article breaks down what that means for the company's potential buyers and for its users.

In 2019, videos on TikTok convinced children they had Tourette syndrome

Right before the COVID-19 pandemic, an "outbreak" of Tourette syndrome was attributed to videos from a German TikToker who documented his life with the condition. The children experiencing the symptoms all had the same tics, which experts say was a case of mass sociogenic illness, also referred to as mass hysteria.

How K-pop conquered the world

How did Korean musical acts go from unpopular and at times maligned to filling arenas and creating one of the most viral music videos of all time? This 25-minute audio documentary from BBC World Service explains how social networks, plastic surgery, and government tax breaks helped turn K-pop into the multibillion-dollar global juggernaut we know today.

X (Twitter) started as a way to share short updates via text

What began as a way to share 140-character updates quickly grew into a vital platform for activism, politics, and pop culture. Hashtags, trending topics, and retweets—now common across the internet—originated on the platform.

Why romantasy is so popular on social media

Much of romantasy's success is thanks to social media, especially TikTok, where posts tagged as #BookTok or #Romantasy often propel titles to mainstream popularity. This deep dive into the trend interviews fans and marketers to explain why the genre's steamy content does so well online.

Youtube, explained

YouTube began as a quirky site where users uploaded funny, random videos—a do-it-yourself television service. Today, it’s a global media powerhouse and home to everything from movie trailers to video podcasts, livestreams, and much more. Want to learn more about the streaming giant? Check out our 5-minute explainer here.

Fast-casual restaurant Chili's is experiencing a resurgence, with its parent company recently reporting a nearly 32% increase in sales, thanks to passionate Gen Z fans on TikTok.

Osamu Dazai's 'No Longer Human' found a new generation of readers, thanks to TikTok

The novel was published in 1948, a month after the writer's suicide, and went on to become a classic of Japanese literature. Decades later, an English translation gained popularity on TikTok, where younger readers praised the book for its handling of alienation. (Some users may experience a paywall.)

The iPhone's impact in 10 charts

It's been almost 20 years since Steve Jobs first unveiled the iPhone, the device that would come to define Apple for years and change not just the smartphone industry but the world at large. 10 examples of the iPhone's impact include its all-screen touch interface and the way it led to the rise of app culture.

How Netflix changed TV

In April 2017, Netflix reached 100 million subscribers worldwide—a figure that hit 300 million by 2025. With 50 million in the US alone, it has revolutionized the way people consume entertainment. Newsweek takes a look into the company's history and how it became the dominant force in entertainment.

The pandemic saw Zoom overtake Skype as the default video conferencing tool

When millions of people needed to become work-from-home experts overnight, ease of use for video conferencing tools became especially important. Zoom's success was partly because the company made it easier to join meetings than Skype did—with Zoom, users only needed a URL to join a meeting, rather than downloading a fully separate app as they did on Skype. (Some users may experience a paywall.)

How Guinness became a social media trend

In early 2024, an unexpected meme emerged on Instagram and TikTok: "splitting the G," where Guinness drinkers would attempt to take a first sip big enough to leave the remaining beer perfectly aligned with the middle of the "G" on a Guinness pint glass. This Vinepair article explores where the trend came from and how it took off.

How Peloton got moms hooked

Peloton's at-home workout classes were a game-changer for parents, giving them a chance to squeeze a workout in without leaving the house. The community group feature on Peloton created a sense of community that made users incredibly loyal to the brand.

Children are now three times more likely to say they want to be a YouTuber when they grow up than an astronaut, with some even attending 'YouTube camps' that teach kids how to create content for the platform.

While the first exchange-traded fund (a 'basket' of different assets that can be bought and sold on a stock exchange) in the US only launched in 1993, the global ETF market has grown to more than $10T in the short time since.

Netflix profits when you're not watching, and its movies are designed that way—read a detail-rich critical essay exposing lesser-known Netflix takes

US consumers collectively owe more than $1T to credit card companies—almost as much as they owe in auto loans.

The name 'Silicon Valley' arose from the founding of Shockley Semiconductor Laboratory in Fairchild Semiconductor in 1956-57, founded near Stanford University in Palo Alto

Hear 50 years of iconic hip-hop samples, the genre's foundational looped tracks

A 2019 Facebook event called on attendees to "Storm Area 51, They Can't Stop All of Us," resulting in countless memes, the creation of a music festival, and eventually the arrests of those who did try to approach the area.

US housing costs have risen by roughly 175% between 1991 and 2026—but a growing number of Gen Zers are becoming homeowners anyway. In 2025, 4% of homebuyers were Gen Z, up from 3% the year before.

'Shogun,' a 1980s TV series, helped popularize sushi in the US by stimulating an American interest in Japanese culture.

Telehealth demand for GLP-1s for weight loss is booming as consumers seek easier access.

Explore an interactive map built from more than 100,000 survey responses on where people find joy in their lives

The US Constitution is widely regarded as the longest-standing written national constitution still in force—see how it has influenced rights worldwide.

Memecoins are a type of cryptocurrency—a form of digital currency with a wide variety of uses—created around popular 'memes,' or viral internet jokes.

Learn how your body is, scientifically, like a firework with its own slow, controlled burn.

Up to a million Girl Scouts sell about 200 million cookie boxes every spring, generating $800 million, largely because refusing a child is frowned upon

Hear about the 250-year history of the United States Postal Service, complete with some of its strangest deliveries, important innovations, and the figures that made it an American institution.

Watch how viruses like Ebola can spill over from animals to humans—and vice-versa.

Some researchers have labeled nomophobia, the fear of being without your phone, as 'the phobia of the 21st century.'

In 2009, the nation was gripped by the story of a missing young boy who was believed to be floating over Colorado in a homemade balloon, until it was revealed that he was at home the whole time.

Crows are believed to have intelligence on par with a seven-year-old child and demonstrate complex behaviors, from problem-solving with tools to recognizing human faces.

Dorothy's famous entrance into Oz in 'The Wizard of Oz' relied on analog tricks, including a body double and sepia-toned paint, as much as it did on technology

In 1963, a basement renovation in Turkey revealed a passageway to a hidden, multilevel underground city that once housed as many as 20,000 people

View the ten deadliest tornadoes in US history.

The Beatles' US label rejected the band's first two singles, 'Please Please Me' and 'From Me to You,' with one executive calling the band 'dead in the water.'