The most underrated reputation-builder and moneymaker for Korean celebrities has nothing to do with entertainment at all; the industry is home to the world’s best advertisers. BLACKPINK’s Jennie turns heads with every brand endorsement, to the point where the public believed that Gentle Monster was her own company, until she was announced as a model for their competitor, Ray-Ban, after her Gentle Monster campaigns came to a silent end. When a top idol like Jennie can take on anything from the luxury fashion of Chanel to household essentials like Vaseline – all while her main job is performing on worldwide stages – it is no surprise that the Korean advertising industry yearns for more celebrities to replicate her commercial magic.

One look at Seoul’s cityscape, and the inevitable becomes obvious; every brand is associated with a face. Printed advertisements on the sides of buses, stickers on glass doors in the drink aisles of convenience stores, and giant billboards accompanying flagship stores make celebrities the forefront of everyday life in Korea. Let’s explore why over 50% of advertisements in Korea feature celebrities, compared to less than 5% in the US. 

The differences lie in celebrity culture itself; Korean consumers are more likely to associate celebrities and the brands they endorse with their overall morality and professional competence. As a result, choosing models with clean, upright images tends to positively impact a brand’s credibility. This showcases an important principle that offers a deeper glimpse into how Korean society views their stars: they are expected to be both experts in their artistic craft and upstanding citizens who uphold and respect societal rules, beyond the glitz and glamour of a flashy advertising campaign. 

While some industries, such as banking, previously prioritized an image representing stability, they have seen greater success in recent years using K-pop idols as models to increase their relevance to a younger demographic of future customers. The safer and more comfortable a celebrity makes the public feel, the more companies can reassure consumers – and their finances – that they’re in good hands. A dramatic shift can be observed over the past two decades, in line with the Hallyu Wave; for the new generation, K-pop idols’ approval has become the new symbol of credibility.

The same applies to the government, which has used friendly idols, such as solo artist Chuu, to promote the Seoul Metropolitan Subway. While one might question why public transportation would need a promotional ambassador, humanizing a relatively rigid and bureaucratic institution with funny skits playing on a loop in each subway car and familiar voices announcing the next stop help build a sense of community, trust, and safety.

Beyond the image of the individual endorser, K-pop marketing has significantly influenced how companies appeal to consumers through their goods and services. A primary goal for any brand marketing its newest product to the younger generation is to go viral via social media. Social media is no longer merely just a hub of entertainment; it serves as the primary marketplace for Generation Z, with celebrities at the forefront of every trend. Companies capitalize on this not only by showcasing big names using their products, but also by leveraging the “collectibility” of exclusive memorabilia, expanding the phenomenon past just albums and idol merchandise. Simple, everyday lifestyle items, such as packs of instant noodles or feminine hygiene products, can fly off the shelves at an unprecedented speed when accompanied by photocards of the hottest idols.

This influence is not exclusive to Korean companies and audiences; international luxury brands also sell more by reaching K-pop fans. Idols have a significant impact on Spanish-speaking Generation Z K-pop fans’ brand loyalty and purchase intentions towards international luxury brands, and K-pop brand ambassadors have a 70.1% influence on consumers' purchasing decisions in Indonesia, underscoring an extremely positive global impact that crosses borders.

While it is easy to think of choosing celebrities as the cheat code for brands to reach new consumers and push their revenue through the roof, things are not always so black and white. Actor Kim Soo-hyun faced multiple lawsuits seeking billions of won in damages after his controversies, potentially violating his contractual advertising obligations to maintain a positive public image, and several brands pulled out from campaigns starring actor and idol Cha Eun-woo following backlash from his tax evasion accusations. No matter how clean a star may seem because of their success – and regardless of the truth behind the negativity – funneling resources into promoting a single entity alongside a brand can be a major gamble for advertisers. As much as they can help sales skyrocket seemingly overnight, it only takes one negative article for it all to come crashing down. When a public figure falls from grace, they lose more than just honor and integrity; the legal structure of these partnerships places an extreme emphasis on penalty fees in favor of the advertiser, with amounts that can be double or triple the initial modeling fee. 

However, despite the catastrophic financial risk posed by potential scandals, the corporate drive to promote Korean stars as the faces of brands worldwide is far too lucrative to ignore. In a hyper-competitive market where consumer trust and virality are the ultimate priorities, a familiar image on a storefront has become a baseline requirement for business. The ubiquity of celebrities in Korean marketing points to a profound cultural truth: products are rarely bought purely for their utility. Instead, consumers are purchasing a piece of idealized morality and the values the models represent. As long as young demographics continue to validate this system with their wallets, Korea will remain plastered with celebrities’ faces as the most valuable commodity to sell.