Hyein Yoon is a globally recognized marketing expert, content creator, and the Founder of HY Marketing.
Her journey in the marketing industry began when she was awarded the 1st Prize for the Gyeongui Line Book Street Promotion (issued by the Korean Publishers Cooperative) in South Korea as Project Team Leader in 2017.
Since then, she has delved into various aspects of marketing as a freelancer as well as working as a proud content manager and project manager for the Women’s Human Rights Institute Of Korea.
During this time, she had the opportunity to collaborate with major platforms like Google, Facebook, and other social media channels, allowing her to gain valuable insights into SEO and social media algorithms.
With a passion for making a positive impact, Hyein also served as a social media manager for global NGOs before venturing into freelancing in 2020.
This transition opened doors for her to work with diverse clients, which led to the establishment of HY Marketing.
To ensure top-notch service delivery, she built a global team consisting of marketers who are native speakers in Japan, South Korea, and English-speaking countries dedicated to providing high-quality solutions for her clients.
Localization isn't a trend.
It's how you build real connection.
Customers trust brands that speak their language culturally and contextually.
Local-first strategies drive higher engagement, stronger loyalty, and better conversion.
Start where your audience truly is at home.
Our most effective tools for market entry and growth
Why global brands keep working with us
GLONET, a 9-Figure Logistics Company
I was able to quickly establish the direction of the project thanks to the youthful perspective and diverse suggestions. It was also great to have immediate cross-checks with fast feedback on the revisions. I am satisfied with the high-quality work achieved at a reasonably fair price.
Goalcast, a 7-Figure Media Company
Working with Hyein was a delight. She is persistent, persuasive, and professional. The company I worked for wanted to expand their presence in Korea by implementing a successful strategy for YouTube and Facebook performance by analyzing data, creating visually appealing posts, managing the YouTube and Facebook channels–and Hyein did that plus the extra mile! Together with the Korean expansion team, she helped achieved 54,000 views and 762 likes on a single YouTube video and grew the YouTube subscriber base by 211 in one month. Super satisfied working with her and would love to work with her again. Thanks Hyein!
CEO of Botari, SaaS Company
During our collaboration with HY Marketing, we received significant assistance in three key areas. Firstly, we gained valuable insights into Instagram marketing. In the past, we believed that simply posting a lot of content would eventually lead to more followers and exposure. However, through specific consultations, we learned how to effectively utilize various content formats on Instagram, such as stories, posts, and reels. As a result, even starting with zero followers, our posts began to receive thousands to tens of thousands of impressions, thanks to the guidance provided during the consultation. This experience has become a vital asset for us in our pursuit of future organic marketing strategies.
Secondly, our understanding of AB testing for ad campaigns was somewhat unclear. With HY Marketing’s assistance, we gained clarity on how to conduct AB testing effectively – from budget allocation and duration to comparing various ad creatives. This guidance allowed us to focus our advertising budget on the most effective ad creatives, maximizing our marketing efforts.
Lastly, we truly appreciated HY Marketing’s objective approach when it came to evaluating the appeal of our ad creatives. As passionate app founders, we were naturally attached to our product, but HY Marketing helped us see things from our potential consumers’ perspective. Their feedback helped us create ad copies and images that resonated better with consumers, surpassing what we had initially prepared. We are grateful for the extensive collection of ad creatives, copies, and planning executed by HY Marketing under a single campaign.
Overall, our collaboration with HY Marketing has been immensely beneficial, and we sincerely value their support and guidance throughout the process.
CEO of Guitar Flyer, Tech & Software Company
1. Content Creation
To reach potential customers and provide value, we were able to identify what titles and content should be used. It was beneficial to have the ability to ‘optimize’ titles and content using objective metrics, as algorithms are often challenging to control.
2. Target Customer Definition
Until the service was launched, we couldn’t precisely identify the actual customers. However, through keyword analysis, it was logical to anticipate people’s demands. If handling marketing or keyword tools is difficult, collaborating with HY Marketing will be more efficient to save time and receive accurate analysis than doing it manually.
CEO of Jiibmoa, Logistics Company Previous Slide
I was truly impressed by their outstanding expertise in performance marketing, especially when it comes to text content. Hyein, a skilled global marketing expert, personally acquired cost-effective search keywords and meticulously handpicked the most relevant ones for SEO incorporation.
Although as a practitioner, I can identify related keywords within the industry, Hyein’s extensive knowledge of advanced marketing tools allowed her to delve into statistics and trends for each keyword, leading to the formulation of strategic marketing approaches and content focal points. I was genuinely touched by her in-depth industry research throughout the process.
For anyone considering working with HY Marketing in the future, I highly recommend collaborating with Hyein to experience their exceptional services.
Proven strategies behind real client growth
Step-by-step process for global growth done right
Start by submitting a brief or contacting us with your project goals, target audience, and desired timeline. We’ll review your needs and schedule an intro call to understand your brand better.
Based on your input, we develop a tailored local-first marketing strategy optimized for the Korean and Japanese markets. This includes channel selection, messaging localization, and platform planning to ensure cultural fit and market resonance.
We execute the strategy with precision launching campaigns, managing assets, and tracking performance in real-time. Continuous optimization ensures your brand grows sustainably in both regions.
Why leading brands continue to work with us
Real-world lessons from the front lines of brand growth
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