Research on superconductors has yielded findings on charge density waves, with studies focusing on various materials, including UTe2, YBa, and URu2Si2. The results suggest complex interactions between charge density waves and superconductivity, with some materials exhibiting inhomogeneous behavior. However, the specifics of these interactions and the presence or absence of charge density wave order in different materials and states appear to be varied and not entirely consistent across the studies.