contribution
US /ˌkɑːn.trɪˈbjuː.ʃən/
UK /ˌkɑːn.trɪˈbjuː.ʃən/

1.
2.
the part played by a person or thing in bringing about a result or helping something to advance
:
•
Her contribution to the research was invaluable.
•
The new software made a significant contribution to efficiency.