It's not just you. The word "demure" is being used to describe just about everything online these days.It all started earlier this month when TikTok creator Jools Lebron posted a video that would soon take social media by storm. The hair and makeup she's wearing to work? Very demure. And paired with a vanilla perfume fragrance? How mindful.Video above: Rossen Reports: TikTok made me buy it, but does it really work?In just weeks, Lebron's words have become the latest vocabulary defining the internet this summer. In addition to her own viral content that continues to describe various day-to-day, arguably reserved or modest activities with adjectives like "demure," "mindful" and "cutesy," several big names have also hopped on the trend across social media platforms. Celebrities like Jennifer Lopez and Penn Badgley have shared their own playful takes, and even the White House used the words to boast the Biden-Harris administration's recent student debt relief efforts.The skyrocketing fame of Lebron's "very mindful, very demure" influence also holds significance for the TikToker herself. Lebron, who identifies as a transgender woman, said in a post last week that she's now able to finance the rest of her transition."One day, I was playing cashier and making videos on my break. And now, I'm flying across country to host events," Lebron said in the video, noting that her experience on the platform has changed her life.She's not alone. Over recent years, a handful of online creators have found meaningful income after gaining social media fame — but it's still incredibly rare and no easy feat.Here's what some experts say.How can TikTok fame lead to meaningful sources of income?There is no one recipe.Finding resources to work as a creator full-time "is not as rare as it would have been years ago," notes Erin Kristyniak, vice president of global partnerships at marketing collaboration company Partnerize. But you still have to make content that meets the moment — and there's a lot to juggle if you want to monetize.On TikTok, most users who are making money pursue a combination of hustles. Brooke Erin Duffy, an associate professor of communication at Cornell University, explains that those granted admission into TikTok's Creator Marketplace — the platform's space for brand and creator collaborations — can "earn a kickback from views from TikTok expressly," although that doesn't typically pay very well.Other avenues for monetization include more direct brand sponsorships, creating merchandise to sell, fundraising during livestreams and collecting "tips" or "gifts" through features available to users who reach a certain following threshold. A lot of it also boils down to work outside of the platform.And creators are increasingly working to build their social media presence across multiple platforms — particularly amid a potential ban of the ByteDance-owned app in the U.S., which is currently in a legal battle. Duffy notes that many are working on developing this wider online presence so they can "still have a financial lifeline" in case any revenue stream goes away.Is it difficult to sustain?Gaining traction in the macrocosm that is the internet is difficult as is — and while some have both tapped into trends that resonate and found sources of compensation that allow them to quit their nine-to-five, it still takes a lot of work to keep it going."These viral bursts of fame don't necessarily translate into a stable, long-term career," Duffy said. "On the surface, it's kind of widely hyped as a dream job ... But I see this as a very superficial understanding of how the career works."Duffy, who has been studying social media content creation for a decade, says that she's heard from creators who have had months where they're reaping tremendous sums of money from various sources of income — but then also months with nothing. "It's akin to a gig economy job because of the lack of stability," she explained."The majority of creators aren't full-time," Eric Dahan, the CEO and founder of influencer marketing agency Mighty Joy, added.Burnout is also very common. It can take a lot of emotional labor to pull content from your life, Duffy said, and the pressure of maintaining brand relationships or the potential of losing viewers if you take a break can be a lot. Ongoing risks of potential exposure to hate or online harassment also persist.Is the landscape changing?Like all things online, the landscape for creators is constantly evolving.Demand is also growing. More and more platforms are aiming not only to court users, but to bring aspiring creators to their sites. And that coincides with an increased focus on marketing goods and brands in these spaces.Companies are doubling down "to meet consumers where they are," said Raji Srinivasan, a marketing professor at The University of Texas at Austin's McCombs School of Business. YouTube and other social media platforms, such as Instagram, have also built out offerings to attract this kind of content in recent years, but — for now — it's "TikTok's day in the sun," she added, pointing to the platform's persisting dominance in the market.And for aspiring creators hoping to strike it big, Dahan's advice is just to start somewhere. As Lebron's success shows, he added, "You don't know what's going to happen." AP technology writer Barbara Ortutay contributed to this story from Oakland, California.