
Keep/have your ear to the ground
Metaphorical Origin
The phrase comes from the practice of putting one's ear to the ground to detect distant sounds, like approaching horses.

As a journalist, she always has her ear to the ground for the latest news.
Business Acumen
Often used in a business context to suggest maintaining awareness of market trends or gossip.

The best investors have their ear to the ground for any financial uncertainties.
Social Awareness
Can imply attentiveness to social changes or public opinion within a community.

Politicians must keep their ear to the ground to understand voters' concerns.
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