When you find someone who asks great questions or gives great answers, you can follow them by going to their profile and clicking on the 'Follow' link at the top of the screen. Once you are following them, you will be able to see all the questions they ask or answer by clicking on your "Connections" link on the left-hand side of your screen.
Go to their profile, by clicking their username or profile picture. When on their profile, click the "Follow" button. And you have then "Added" them. Welcome to ask.com. Hope this has helped. And as always, Have a good day.