One feature that would help a resume builder gain traction in the market is the ability to automatically generate a resume based on a user's input and professional experience. This would allow users to quickly and easily create a professional-looking resume without having to spend a lot of time formatting and organizing the information themselves. Additionally, the resume builder could offer pre-designed templates and customizable options to allow users to personalize their resumes and make them stand out. This feature would be particularly appealing to busy professionals who need to create a resume quickly and easily.