These hundred Names of Lord Vishnu are given in the Padma Purana was taught by kunjala to his son, the hundred names of this hymn eulogizes lord Vishnu with various epithets.
This hymn when chanted with devotees cleanses us of our sins and gives us recourse.
A doer of good meritorious deeds, who praises lord Krishna (Vishnu) with steady mind using this hundred name hymn will attain the world (abode) of Madhusudana, after being purified by his own merit and virtue. One who chants will attain the merit of bathing in river gaṃgā regularly by the virtue of chanting this hymn. shall attain the merit of performing horse sacrifice etc.
This hymn is also prescribed to be chanted on special days like Ekadashi while fasting to please lord Vishnu. We can also chant this hymn in the proximity of tulasi plant or while worshipping the saligrama form of lord Vishnu. It is recommended to be chanted for the liberation of our dead forefathers.
This hymn is capable of granting pleasures, and liberation, it should be chanted certainly. By the grace of keshava, the devotee gains mastery over all siddhis, and accomplishments.