"valuable contribution" means making a helpful and important addition to something, like a group or a project, that is highly appreciated and makes a positive impact. Full definition
This HVAC project engineer resume example will make valuable contribution in generating ideas that make your resume sound professional and appealing. (bestsampleresume.com)
The real estate related most valuable contribution of the Net? (remonline.com)
It is, in my judgment, the most valuable contribution of the work. (religion-online.org)