Those selectors all have methods attached to them, including addClass. So, if I had an element with an id of “foo” and I wanted to add the class of “bar”, I would do:
$("#foo").addClass("bar");
The $("#foo") selects the element, and then on that I apply the method addClass("bar").
Add the animated class to all elements with type button.
Add the shake class to all the buttons with class .btn.
Add the btn-primary class to the button with id #target1.
I don’t see where you have done that.
Your first line:
$("button").addClass("animated bounce");
You are adding to button elements, but you are adding two classes, “animated” and “bounce”. Where were you told to add that second class?
For the second instruction, I guess you have this:
$(".well").addClass("animated shake");
That isn’t the right class to target (“.well”?) and again, you were only told to add one class.
For the last, you have:
$("#target3").addClass("animated fadeOut");
Again, not the right target and only add the class you were told to add.
I’m not sure about the last line, why you are trying to remove a class. When were you told to do that?
You have to read the instructions very carefully and follow them very carefully. Don’t do anything you were not told to do. I know that sounds strict, but computers are very picky and really, in a professional setting, making as few changes as needed is often a good idea.