Definition of do something (or nothing) for in English:

do something (or nothing) for

phrasal verb

informal
  • Enhance (or detract from) the appearance or quality of.

    ‘whatever the new forum does for industry, it certainly does something for the Minister’
    ‘that scarf does nothing for you’
    • ‘Why would she choose to wear such a horrendously unflattering dress? It just does nothing for her.’
    • ‘It's a color that does nothing for you.’
    • ‘That hairstyle does nothing for you, Kat.’