What is the education discount

I have applied for the educator account and I just add Devonthink pro to my cart, the discount is 25%. It shows the discount is based on Black Friday. So I want to ask what is the education discount and how can I use the discount.

The educational discount is 20% but, only this weekend, is superseded by the Black Friday/Cyber Monday discount. Person-bound discounts (like the educational discount) and global discounts (like Black Friday) cannot be combined.