The White Fox

[serious question] why is silver important in the cosmere? I remember silver is abundant on threnody and I think the worldhopper nazh has a dagger made of silver, but I don't remember it having any special properties?

Long time lurker and and completely obsessed with the cosmere. How do other users get flair next to their name like "misting, steel inquisitor, surgebinder" and stuff like that?