One potential feature that could help a resume builder gain traction in the market is the ability to automatically generate a customized, professional-looking resume based on the user's input. This would save job seekers time and effort, and could potentially improve the quality of their resumes by highlighting their skills and experience in a more effective way. Additionally, the resume builder could offer a variety of customizable templates to choose from, as well as tools for editing and formatting the resume to ensure it stands out to potential employers.