Make password recovery for your PSN account easier by setting a security question and security answer. This will add an additional layer of security to your account, allowing you to recover or change your account password by replying to an email and correctly answering your security question. The instructions in this video are for a web browser. Check out this video to learn about setting your security question and answer on a PS4 system: https://youtu.be/zhkH8DY45fY

Check out these videos to learn more about PlayStation Network account security:
How do I secure my PSN account? : https://www.youtube.com/watch?v=BACYf1OYGiU&list=PL0KZUj34U60vn_BULaoL5v_10ROdTU6Ql
How do I reset my PSN password? : https://www.youtube.com/watch?v=1x1pWMhdnVk&list=PL0KZUj34U60vn_BULaoL5v_10ROdTU6Ql&index=2
How do I set up 2-Step Verification on my PSN account? : https://www.youtube.com/watch?v=b4zK0Gb8uCk&list=PL0KZUj34U60vn_BULaoL5v_10ROdTU6Ql&index=3

https://account.sonyentertainmentnetwork.com

Source: Playstation YouTube
—