If you're looking to switch careers, online courses can provide the necessary knowledge and skills. For instance, if you're a marketer wanting to transition into data science, you can take courses in statistics, programming, and data analysis. You can build a portfolio of projects completed during these courses to demonstrate your new skills to potential employers. It's a cost-effective way to make a career shift without going back to school full-time.

For career advancement within your current field, online courses can fill skill gaps. You might need to learn new software or management techniques. An engineer could take an online course on the latest engineering software to stay competitive. Upgrading your skills through online courses can lead to promotions, salary increases, and more responsibilities. They allow you to stay updated with industry trends and emerging technologies.

Networking through online courses can also be beneficial. Some platforms offer networking opportunities with peers and instructors. You can connect with professionals in your desired field, which could lead to job referrals or collaboration opportunities. Participating in group projects and discussions can help you build a professional network that could open doors for career growth.