A more thorough explanation:

The Clerk of the House of Commons is an important officer who works in the House of Commons. Their job is to keep a record of everything that happens in the House of Commons. They also sign orders and take care of all the important documents.

The Clerk is appointed for life by the Crown. This means that they have a very important job that they will do for their whole life.

For example, if a new law is being made, the Clerk will make sure that all the important documents are in order. They will also make sure that everything is recorded correctly so that people can look back and see what happened.