You can tell someone is a good leader by how well they communicate. A good leader can explain things clearly so everyone knows what to do. They also listen to other people's ideas and make sure everyone is on the same page. If someone gives helpful feedback and encourages people to talk openly, that's a sign they're a strong leader.

Another way is by seeing if they inspire others. Good leaders motivate people to work hard and try their best. They set a good example, so others want to follow them. Usually, people trust and respect leaders like this, and you can see it in how the team acts.

You can also tell if someone is a good leader by how they deal with problems. If they stay calm when things go wrong and try to solve the issue instead of blaming others, that's a good sign. Good leaders also admit when they make mistakes and learn from them, which helps the team trust them more.

Finally, you can look at the team's performance. If the team works well together and reaches their goals, it's probably because the leader is doing a good job. Team members who feel supported and valued usually perform better, and there's a positive feeling in the group.