metalsare good conductors of electricity . why

Hello student
Metals are good conductors of electricity because the electrons are free to move in a network of metal atom. As there is a "Sea of Electrons”.
These electrons do not belong to just one atom but move freely about the metal's network which makes them great conductors of heat and electricity. Also, because they contain many orbitals separated by extremely small energy differences, metals can absorb a wide range of light frequencies also.