Using different passwords for different accounts and login is always a good idea and best practice in todays society. Although it is easier to use the same password for all logins it is not reccomended due to the fact that if one password becomes breached all of your accounts are at risk.
Why is this such a good idea?
Imagine if you have the same bank card PIN for 3 different cards which all have £4000 in each account. If somebody knows 1 Pin they have access to all £12000 but if they have different PINs then only have access to £4000. This is exactly the same with any kind of login portal , email address or even social media accounts.