How to buy student discount?

I'm curious about how one would go about acquiring a student discount for various products or services. Could you please explain the process in detail? Do I need to present any specific documentation, such as a student ID or enrollment verification, to qualify for these discounts? Are there any limitations or restrictions I should be aware of? I'm particularly interested in understanding the process for obtaining discounts on educational materials, software, and online subscriptions. Thank you for your help in clarifying this matter.