helpfulness

US /ˈhelp.fəl.nəs/
UK /ˈhelp.fəl.nəs/
1.

sự hữu ích

the quality of being helpful:

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91 percent of people were satisfied with the speed, courtesy, and helpfulness of the staff.
:
helphelpfulhelpinghelp on withhelp deskhelp outcall for help