Ever sat down for a quick five-minute break on TikTok, only to realize three hours have passed? If so, you are not alone. 

TikTok’s massive growth began during the COVID-19 pandemic. It grew faster than Facebook and Instagram ever did, quickly becoming one of the most popular social media platforms in the world.

By 2021, TikTok was the most visited website on the internet. In 2022, the app reached nearly 1.5 billion users. That same year, it made $9.4 billion in revenue, almost double what it made the year before.

Today, the average user spends about 1 hour and 37 minutes daily on the app. That is roughly 10% of the time most people are awake! This number is only expected to continue growing as TikTok becomes a bigger part of our daily lives. So it’s undeniable that TikTok is here to stay.

What Makes TikTok so Popular?

The secret lies in the app’s design. 

Features like the ‘infinite scroll’ keep users engaged for hours. While the short, easy-to-watch videos appeal to audiences of all ages. 

However, the algorithm is the true game-changer. TikTok builds a "For You" page tailored to every single user based on the content they find to be most engaging. As viewers follow creators or like posts, the platform learns exactly what they enjoy. This turns the app into something far beyond entertainment. 

It becomes a space where people easily find content that aligns with their personal tastes. Communities form around these shared interests, and that’s where TikTok’s niche communities enter the group chat.

What Do Niche Communities Look Like on TikTok?

Niche communities function like specialized cliques, each centered around a shared passion.

These TikTok niche communities create a strong “in-group feeling” that gives members a true sense of belonging. Because the app consistently shows users content that matches their interests, it keeps them engaged and helps them feel part of a digital tribe. 

Once the algorithm learns what a user likes, it unlocks a feed of video styles unique to that niche. This draws people into the corners of the internet that reflect their passions. Making them want to come back for the latest trends and tips from the creators they trust.

The interaction does not stop at the video content itself. It continues in the comments section. Users often develop inside jokes or slang that only people in that community understand, or as the internet says, “IYKYK”. 

These conversations cement TikTok’s reputation as a community-driven platform. For many, it is much more than watching the screen, it’s about being part of a group that understands them.

Growing Brand Reach Beyond the Typical Audience

The rise of TikTok and its tight-knit communities creates fresh opportunities for brands. It allows them to deepen relationships with current audiences and reach new, highly engaged groups. 

Ads are no longer the only way to connect people on the platform. Instead, brands are trying new, creative ways to stand out.

This includes making community-first content, working with niche influencers, and planning thoughtful campaigns. In return, users respond more positively to brands that understand a community’s norms, humor, and “insider” language. 

When brands identify the right TikTok niche communities and create content that feels natural, they build a strong presence and a loyal fan base.

Niche Communities Dominating TikTok Feeds

As these TikTok niche communities gain more influence, they push brands to try fresh, creative ways to reach these new audiences. Some popular communities include: 

#BookTok

BookTok is one of the most influential groups on the app, helping people rediscover a love for reading. Passionate fans share their book reviews, discuss the latest book news, and create videos inspired by the stories they love. 

Because of this powerful movement, books become massive hits overnight. It also turns fan favorites into popular movie and TV adaptations, such as The Summer I Turned Pretty, People We Meet on Vacation, and The House Maid, among others.

The community’s impact became clear in 2021, making it a record-breaking year for the publishing industry. It was also the same year author Colleen Hoover sold more books than the best-selling book of all time: the Bible. Take a moment to let that sink in.

Readers now also seek BookTok-inspired experiences based on their favorite stories. This creates a perfect opportunity for brands to connect with fans by bringing these stories to life beyond the page.

Luxury fashion brands like Dior and Coach embrace the #BookTok trend by taking inspiration from classic novels. Dior released the Book Cover Collection, which features tote bags designed to look like the first-edition book covers of famous 19th- and 20th-century books.

Each embroidered bag reflects the spirit of classics like Dracula, giving fans a way to carry a piece of the story with them. 

Coach also pays tribute to readers with bold accessories. In collaboration with Penguin Random House, Coach introduced a collection of tiny, readable book bag charms. Each charm features a vibrant book cover and leather spine with the Coach logo.

These pieces let readers show off their love of literature while adding a stylish, personal touch to any bag on the go.

Miu Miu took a different approach to connect with readers. In 2024, the brand launched a “Summer Reads” series in select cities around the world. Each city featured reimagined newsstands where visitors received important books by authors like Alba de Céspedes, Sibilla Aleramo, and Jane Austen to celebrate influential female voices in literature. 

The series continued the following year by transforming iconic parks and green spaces across the globe into immersive spots for reading and reflection. Visitors received books by writers such as Simone de Beauvoir and Fumiko Enchi, each decorated with custom Miu Miu designs. 

#SustainabilityTok

As awareness and urgency about climate change grew, the push for sustainability created one of the most active niche communities on TikTok. 

Rooted in values like mindful shopping, eco-friendly living, and environmental activism, this community shares a wide range of helpful content.

From thrifting hauls and zero-waste tips to sustainable brand recommendations and calling out “greenwashing,” it evolved from a simple trend into a movement focused on building a better world.

Actions speak louder than words in this community. Aware of this, Coach addressed the community’s concerns around fast fashion and textile waste by launching its sub-brand called Coachtopia.

Instead of wasting leather, the brand took a creative approach by turning leftover materials into its signature Alter/Ego bags. 

Since these bags use recycled leather scraps, every piece has its own distinct look and pattern, so no two are exactly alike. By placing circularity and upcycling at the core of its mission, Coachtopia cuts down on waste and gives the brand’s classic styles a fresh, eco-friendly update.

Beyond changing brand practices or making “green” products, some brands go the extra mile to create an impact that helps the planet on a larger scale.

Adidas partnered with Parley for the Oceans to turn running into a way to remove plastic waste from the ocean. The campaign encouraged people to join the cause, with Adidas pledging a donation for every kilometer that runners tracked on its app.

As part of the collaboration, Adidas also released a Parley shoe collection featuring performance trainers made from recycled ocean plastic. 

Every step counted in this campaign. In its first year, nearly one million runners worldwide came together to raise $1 million for Parley for the Oceans.

The momentum only grew with over 2.2 million participants the following year, with Adidas reaching its $1.5 million donation goal within the first day. Truly demonstrating the power of community in action.

#RunTok

Another niche community bringing people together from all walks of life is RunTok. From marathon veterans to first-time runners, members are united by a shared love for the sport and commitment to their training journey.

Rooted in grit and hard work, RunTok helps runners find a virtual “pack” that matches their pace or goals. It becomes a supportive space where members cheer each other on and celebrate wins, knowing how demanding the sport can be.

Content in this group reflects the reality of the running culture. It features training tips, gear advice, and “run with me” clips that serve as a digital diary for tracking personal progress. For many, it shows that running isn’t just a hobby, but a way of life. 

Activewear brands are tapping into RunTok, going beyond traditional product marketing. In doing so, they bring the spirit of movement into real brand experiences.

This shift is already taking shape through brand partnerships and community events, as active celebrities host run clubs with fitness partners for fans to connect in person.

Rapper Gunna teamed up with Under Armour to bring the “Wunna Run 5K” charity tour to several cities. He invited fans to stretch, run, and meet him one-on-one. Under Armour also provided exclusive items with “Wunna Run” branding to mix fitness with hip-hop culture.

Through his “Experts Only” brand, which promotes a balanced lifestyle, DJ John Summit teams up with Lululemon to host short runs for fans. Guests sign up in-store for limited-edition Lululemon gear, ending their run with a surprise DJ set at the finish line.

Beyond hosting run clubs, brands design campaigns that capture RunTok’s passion for the running lifestyle.

When HOKA launched its “Together We Fly Higher: Power of Community” campaign, it captured the runner’s journey, highlighting the highs and lows of training and race day.

The campaign resonated with runners everywhere by celebrating the spirit of community and showing HOKA’s commitment to putting people first. It reminds runners that they are not alone and have a supportive community cheering them on.

Niche Communities Are Key for Future Brand Strategy

In the past, brands told customers what they should like. Today, they look to online communities for inspiration. By watching how TikTok niche communities behave, brands learn what people truly care about, what content they enjoy, and how they like to connect. The answers lie within these digital spaces.

Each niche acts like a guidebook for effective marketing. Every community shares its unique values, interests, and the kind of content it loves to watch. The main challenge for brands is finding a niche that feels like a natural fit. Success depends on creating campaigns that feel authentic rather than forced.

When a brand picks the right community and creates content that feels authentic, it builds lasting trust. This allows brands to do more than just boost sales, but also develop loyal consumers who identify with the brand’s mission. The future of brand growth is powered by these deep, digital connections. 

By taking the time to listen, learn, and lean into the unique culture of TikTok niche communities, any brand can uncover fresh inspiration for growth. The next big idea for brand strategy starts with an infinite scroll down TikTok niche lane. 

🪽 Written by Maricarmen Garcia