SilverLight Web Part on Sharepoint Server 2010

Today I was working with Sharepoint Server 2010 specially with the web parts and found one interesting web part known as "Silverlight web part" which is under Media and Content. When i try to add this web part it asked for a .xap file. Since I was not a developer I had very less idea about xap files.

Finally I got a got a xap file (basically a silverlight file) and when added it worked perfectly fine. It definatley made the life of non-developers (like me :) ) very easy.