The attribute of the following code? The Description of the? What's that mean?

 public static string GetDescription (Enum value, Boolean nameInstead=true) {
Try {
Type Type=value. GetType (); 
String name=Enum. GetName (type, value); 
If (name==null) {
return null; 
} 

System. Reflection. FieldInfo field=the GetField (name); 
DescriptionAttribute attribute=System. Attribute. GetCustomAttribute (field, typeof (DescriptionAttribute)) as DescriptionAttribute; 

If (attribute==null & amp; & NameInstead==true) {
return name; 
} 
The return attribute? . The Description; 
} catch {
Return a string. The Empty; 
} 
}