Whenever someone comments on something you have posted, you will be notified by email.  The default setting is for an email to be sent out whenever anything that relates to your account occurs.  If you decide you are getting too many notification emails, you can pick and choose which ones are sent. 

For example, you may not want to be notified every time there’s a reply to one of your comments but you may want to know when other members send you a personal message or a friend request. 

To change your Notification settings click “Settings” in the menu at the top of the page, then choose the “Notifications” button.  Decide which notifications you want to receive and then click the “Save Changes” button.