The recitation of the Jayamangala Gatha (joyous victory), a set of eight benedictory stanzas extolling the virtues of the Buddha, is usually done on auspicious occasions or when inaugurating any venture of significance.
The angelic voice of Imee Ooi sings it beautifully. The recitation is to bring happiness and success in all good endeavors we embark upon.
Reference:
https://insighttimer.com/bhantesujatha/guided-meditations/blessings-chant-for-well-and-healing
https://dhammawiki.com/index.php/Jaya_Mangala_protection_verses
https://en.wikipedia.org/wiki/Maṅgala_Sutta