This is a dua you want to make often because Allah praised those who say it as "My slaves".
Check the context - the people of the Hellfire whose scales were light of deeds and who turned away from Allah's remembrance will say:
Our Lord, remove us from it, and if we were to return [to evil], we would indeed be wrongdoers."
(Allah or the angels will) say:
"Remain despised therein and do not speak to Me.
Indeed, there was a party of My servants who said, 'Our Lord, we have believed, so forgive us and have mercy upon us, and You are the best of the merciful.'
But you took them in mockery to the point that they made you forget My remembrance, and you used to laugh at them.
Indeed, I have rewarded them this Day for their patient endurance - that they are the SUCCESSFUL."
SubhanAllah do YOU want to be part of the SUCCESSFUL ones?
Straight after that Allah mentions he will ask people - how long do you think you spent in the world and in your graves? People will say maybe a day or part of a day...
That's how short this life is.
Don't worry if someone's annoying you or mocking you. Stay patient persevering on the straight path and you will be successful!
[Source: 23:107-111 - read around for more context]
