helpfulness

noun
1
the quality of helping in a particular situation
کمک کنندگی, کمک رسانی, یاری, یاری رسانی
synonym usefulness
2
the quality of showing that you are willing to help somebody
کمک کنندگی, یاری, حاضر به کمک
We were very impressed with the friendliness and helpfulness of the locals.