The phrase "significant momentum" means having a strong and powerful force or energy that leads to noticeable progress or advancement in a particular situation or context. Full definition
The tipping point is the stage where small changes and advances have accumulated to gain significant momentum toward more profound progress. (edutopia.org)
In the meantime, it is generating significant momentum in a market struggling for direction. (hacked.com)
There is significant momentum for charter school facilities funding this legislative session. (txcharterschools.org)