If you want to learn more about competitive business strategies, these are the courses I took that I found helpful:

• Competitive Strategy (part 1), taught by Prof. Tobias Kretschmer of LMU Munich: https://www.coursera.org/learn/competitive-strategy?specialization=competitive-strategy
• Advanced Competitive Strategy (part 2), taught by Prof. Tobias Kretschmer of LMU Munich: https://www.coursera.org/learn/advanced-competitive-strategy