Moveit Benchmark Comprehension questions about Units and States

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I am able to start Moveit2 Benchmarks with own Scenes, but I do not understand the Query and start states that are used. I think the "start state" is what the name suggests, but what about the Queries? Is a query every Goal state in the list? and what is the Order of the states inside the query?

Also, I'm having trouble interpreting the data on "plannerarena" correctly. Some values have no units like for example "final path length". Is there any documentation available about which value has which unit and what it expresses?