A good summary of an informational text must include all details contained about what the subject is. A good summary must also not be plagiarized, and it should include text evidence that is relevant to the topic of discussion. A good summary of an informational text must solely include the significant details, rather than telling all of the events that happened in the passage. Additionally, a good summary should also include an initial account of what happened but there should not be any opinions or biases present.