The phrase "big strides" means making significant progress or improvements in something quickly and effectively.
Sentences with «big strides»
Which doesn't mean you can't make big strides in that direction. (inc.com)
Employers should recognize that in order to retain quality candidates they may need to make bigger strides in compensation and other methods for increasing employee satisfaction with their position. (blog.simplyhired.com)
I don't kick the bottom seat as I thought I would taking big strides. (philandteds.com)