The phrase "ambitious impact" is correct and usable in written English. It is typically used to refer to a significant effect or result that one is trying to achieve. For example, "The speaker spoke of making an ambitious impact on the audience to convince them to donate.".
In total, analysts who have studied the president's options believe they could, at their most ambitious, impact some 5 million undocumented migrants – almost half of the estimated 11 million currently in the country illegally.
From the very beginning, Larry and Sergey have talked about using technology and innovation to drive ambitious social impact.
The ambitious, high-impact sculpture exhibition, "Off the Wall," on view at Bristol-Myers Sept.b through Sept. 9, features artists affiliated with the Mason Gross School of the Arts at Rutgers University.
At Student Reporter, we will certainly be applying these as we scale up our venture to match our own ambitious vision and impact.
The range and breadth of the output is truly impressive, and I am really looking forward to working with the team to pursue great journalism which is both ambitious and high-impact".
Nor would a vastly more ambitious effort have much impact.
I am all for ambitious targets: the devastating impact of HIV/AIDS and malaria calls for nothing less.
Ludwig does not simply clarify my doubts with English writing, it enlightens my writing with new possibilities
Simone Ivan Conte
Software Engineer at Adobe, UK