Silver (Ag) is a very good electric conductor, a very good termic conductor and lasts for thousands of years. Silver (Ag) does not oxidize. These are the special advantages of Silver (Ag)
As mentioned by Valentin Bogatu , pure silver has the highest electrical and thermal conductivity of all metallic elements in the Periodic Table. Unfortunately, silver does readily form a tarnish film in the presence of sulfur. As mentioned by Philipp Schreier , it would be very helpful to know your technical application for silver.