Implicit means something not clearly stated, so implicit details are details that are not clearly stated. Or rather, they are details that are more implied, rather than given. And how they contribute to the story is that they make the reader figure things out, so it isn't just another easy story to read, but it is a little more difficult to read, because you have to figure things out. hope this answer helps :)
<span>Macbeth gets greedy and believed that Banquo stole the throne that was supposed to be his when the prophecy said that it was Banquo’s children who will eventually have the throne. Macbeth planned to have Banquo and his son killed so they have no chance of taking the throne but Macbeth failed to resolve this because the Banquo’s son escaped and Banquo was the only one who’s killed.</span><span>
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