To mind or worry about something; to pay attention to or be concerned (often with a negative nuance of caring too much).
他人の評価をあまり気にしない方が楽だよ。
It's easier if you don't worry too much about what others think.
服装を気にする必要はない。会議はオンラインだよ。
You don't need to worry about your clothes. The meeting is online.
小さなミスを気にすると先に進めないよ。
If you fuss over small mistakes, you won't be able to move forward.