The criteria of a good monitor

Many people think that the team leader is more difficult to do in the enterprise. Unlike middle managers, he can't do his job by executive order. Moreover, the team leader generally has a high skill level, but the management level is insufficient, which leads to the whole team in the safety work execution is not strong. What makes a good team leader? From the perspective of execution, how should competent team leaders effectively carry out management work?

The criteria of a good monitor