Okay, so imagine there is a really big group of people that go to a special place called a church. In Scotland, this group is called the Church of Scotland. They have a special meeting every year called the General Assembly where they talk about important things that are happening in their church.
Now, sometimes this meeting gets really important and they need someone special to lead and represent the church. This very important person is called the Lord High Commissioner. They are kind of like a king or queen who goes to the meeting and represents the leader of the country, who is the queen of Scotland.
The Lord High Commissioner's job is to open the meeting and give a speech to all the people there. They also get to meet with important people like the leaders of the church and the government. They listen to what everyone is saying and make sure that the government knows what is happening in the church.
It's a very big responsibility because the Lord High Commissioner needs to be fair and make sure that everyone's opinions are heard. They try to help people work together and make good decisions for the church.
It's kind of like being the leader of a very important club or group. The Lord High Commissioner is like the president, who makes sure everyone gets along and that things are done properly.