What do I do with a received request?
If you want to add this person to your friends, you can accept the request.
If you do not want to add this person to your friends, you can reject the request.
Will they get notified if I decline a request?
No, if you decline a request, the sender will not get a notification. However, the sender might notice that you are no longer in the 'Sent requests' list.
Request from a stanger
Please see this page for more information about what to do with a request from someone you don't know.