How do students get student discounts?

I'm curious, could you elaborate on how students can acquire student discounts? Is there a specific process or steps they need to follow? Are there any requirements or qualifications they need to meet? Additionally, are there any limitations or exclusions to these discounts? Lastly, are these discounts available across various platforms and industries, or are they limited to specific ones? I'm interested in understanding the overall process and what students should expect when seeking out these discounts.