If you gratify your own or another person's desire, you do what is necessary to please yourself or them. We gratified our friend's curiosity = satisfy + gratification grati·fi·ca·tion sexual gratification
If you are gratified by something, it gives you pleasure or satisfaction. Mr. Dambar was gratified by his response. + gratified grati·fied He was gratified to hear that his idea had been confirmed They were gratified that America kept its promise. + gratifying grati·fy·ing We took a chance and we've won. It's very gratifying. + gratification grati·fi·ca·tion He is waiting for them to recognise him and eventually they do, much to his gratification