serve a purpose
US /sɜːrv ə ˈpɜːr.pəs/
UK /sɜːrv ə ˈpɜːr.pəs/

1.
berfungsi, berguna
to be useful or to have a function
:
•
Does this old tool still serve a purpose?
Apakah alat tua ini masih berfungsi?
•
Every part of the machine must serve a purpose.
Setiap bagian mesin harus berfungsi.