Coming from comics, we’re used to death being a revolving door. Heroes and villains die frequently and eventually return. It’s part of the tapestry that makes superhero comics what they are. The impact of these deaths, when done well, is a source of great drama and character exploration. Their purpose is to reinvigorate the ongoing stories with a new status quo and open up new paths of storytelling. Likewise when the same characters return.
https://delorean27.wordpress.com/2015/06/15/game-of-thrones-death/