The phrase "a useful benefit" is correct and usable in written English.
It can be used when describing an advantage or positive aspect of something that is practical or helpful.
Example: "The new software provides a useful benefit by streamlining our workflow and increasing productivity."
Alternatives: "a valuable advantage" or "a practical gain."
The award came with a useful benefit — discounted airfares.
Roger Burden's belated declaration that he may stand for the position of full-time chairman of the Football Association has produced a useful benefit for the acting chair.
The Mobile Lab offers a useful benefit in that we can apply a rigorous lab-based method, in a kitchen setting with real users.
When you offer a product for free, you aren't forced to justify your existence to customers or show a useful benefit.
78– 80 The simulated phase III trial showed slightly longer median survival in the 125 mg/m docetaxel group than in the 100 mg/m group, but the results did not show a useful benefit of increasing the dose.
Volunteers suggested that the research teams should devise an adult literacy programme to support volunteers who cannot write their names, during long-term trials so that volunteers unable to write their names at the start of a trial would be able to do so by the end, as a useful benefit for volunteers.
The power calculation was based on a clinically useful benefit of a moderate standardised effect size (ES) for the ketamine-saline difference (0.5 0.6).
This would provide a very useful benefit for analysis by taking whole pixel yields into the 100s of ions, but only future experiments will prove this.
Therefore, the pattern should hold through time, and paleotemperature can be inferred from fossil floras without precise systematic information, an especially useful benefit because isolated fossil leaves, the most common type of plant fossil, are notoriously difficult to identify [3], [4].
Amazon today rolled out a small, but useful benefit for Amazon Prime members who use the company's Prime Music streaming service.
At least for adults, we would suspect some sort of social context or useful benefit for such a large, showy and energetic behavior.
