How do you use a PlayStation gift card?

How do you use a PlayStation gift card?
How to redeem a PlayStation Store voucher on a web browser

Go to PlayStation Store and click on your Avatar at the top of the screen.
Select Redeem Codes from the drop-down menu.
Carefully enter the code and select Redeem.
The credit or content is now applied to your account.

How to redeem a PlayStation Store voucher on a web browser
  1. Go to PlayStation Store and click on your Avatar at the top of the screen.
  2. Select Redeem Codes from the drop-down menu.
  3. Carefully enter the code and select Redeem.
  4. The credit or content is now applied to your account.