Raise the bar
Definition 1 of 2
Pro Tip 1/3Metaphorical Usage
Often used metaphorically to refer to non-physical challenges or standards in work, education, or other fields. 
This year, our debate team really needs to raise the bar.
Pro Tip 2/3Positive Connotation
Carries a positive sense of improving quality or performance, usually implying progress or innovation. 
The new software update will surely raise the bar for user experience.
Pro Tip 3/3Subjective Perception
What 'raising the bar' means can vary depending on individual or cultural expectations. 
With her exceptional singing, she's raised the bar for aspiring musicians in our town.