1. Log in to Onion College official website.

2. Find the course selection page on the website and browse the list of available courses.

Select the course you are interested in, and then click the "Buy Now" button on the course selection page.

4. After entering the purchase page, you will see an input box marked with the words "experience coupon number".

5. Enter the experience coupon number to ensure accuracy.

6. After confirming the correct input, click the Activate button to activate the experience coupon.

7. If the experience voucher is activated successfully, you can enjoy the learning experience of the selected course for free.