Imagine a library counter. You can ask for "something about Kubernetes": the librarian understands, tolerates your accent, and offers you books ranked from most to least relevant. That is match. You can also ask for "the book whose exact call number is 005.43-KUB": there, no interpretation, it is all or nothing. That is term. And when you specify "about Kubernetes, for beginners, free or cheap, but not in English", you combine a fuzzy request (to rank) with strict criteria (to filter). That is bool. The whole Query DSL revolves around this difference: rank what resembles your request or filter what matches exactly.
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