I found this feature is just great.
Not sure if it is applicable in Canada.
Do you find yourself misplace your card? But know that you do have it in the house.
So instead of reporting lost and getting a new number, therefore re-enrolling all the payment accounts with new number LATER.
You could just LOCK it until you can locate the card.
Just test out that feature now.
This will save your hassle and credit card company a lot of expenses too for temporary disabled list hahaha.
BTW all currently enrolled payment accounts are NOT affected by locking the card, the payments will go through.