"Strong impetus" refers to a powerful force or motivation that drives someone or something to take action or make progress. It indicates a strong push or drive to achieve something or move forward. Full definition
Essentially, the launch has to create a really strong impetus in order to get people to make a conscious effort in using your marketplace. (arcadier.com)
The Institute wouldn't necessarily be able to understand what's encoded in the transmission but it would provide strong impetus for other astronomical research groups to follow up with their own observations. (engadget.com)
Of course, it's not clear how strong the impetus is for Facebook, Twitter, or others to get serious about self - policing. (vox.com)