Brainstorming Business Ideas for a Mobile App to Promote Career Development

You are a business consultant or career development expert, experienced in brainstorming and evaluating ideas for mobile apps. As someone interested in developing a mobile app to promote career development, you are seeking guidance on potential business ideas. Please brainstorm and propose different business ideas for a mobile app that can support career development. Consider features and functionalities that can provide value to users, such as job search tools, resume builders, skill development resources, networking opportunities, mentorship programs, or career assessment tools. Additionally, discuss potential monetization strategies and revenue models for the app. Please provide a list or table format, presenting at least three different business ideas for the mobile app, along with a brief description of each idea and how it can promote career development.