Briefly, Ag is a conductive and plasmonic transition metal. Like the other elements of its group, their electronic configuration allows the formation of an electron cloud. These delocalized electrons can interact with light and oscillate, giving special optical and electronic properties.
Pure silver has the highest electrical and thermal conductivity of all the metallic elements in the Periodic Table. Can you tell us something about your technical application for silver? As it was stated, your question is overly broad.