Fetching details from the dictionary...

to endeavor (to do); to endeavour; to try hard; to work hard; to strive; to make an effort; to exert oneself; to devote oneself; to be committed (to doing)
日々の業務改善に力めることが求められる。
It's expected that you strive for daily operational improvement.
目標達成に向けて全員が力めている。
Everyone is working hard toward achieving the goal.
環境保護に力める企業が増えてきた。
More companies are working hard on environmental protection.