The phrase "important breakthrough" refers to a significant discovery or achievement that holds great significance and has the potential to make a significant impact or change in a particular field or area of study. Full definition
A startup claims to have made important breakthroughs in grid - scale battery technology. (treehugger.com)
On the face of it, fast charging is arguably one of the most important breakthroughs in battery technology in recent years. (androidheadlines.com)
One of the most important breakthroughs for my business involved cutting costs by discovering alternatives to my current business expenses. (rocketlawyer.com)