Cockatoos are social birds. They find it gratifying to spend time with humans. They are also easy to tame and train. They love rewards and appreciation.
Cockatoos need heaps of human interaction and love. One cannot leave them on their own for a long time. You need to invest a lot of time to keep your bird happy and healthy.
A cockatoo will show some provocative behavior if it is ignored or left alone for long.
Apart from time and affection, you also need to take care of their diet, make sure that they are entertained and get adequate exercise.