The document provides guidance on how to write a summary. It outlines the key steps as reading the source material, deleting unnecessary information, and finding the main idea. It emphasizes that a summary should be brief, objective, and avoid personal opinions. The document also notes that summarization skills are useful in everyday communication and in professional contexts. Finally, it describes the key features of a summary as being shorter than the original while retaining the main ideas, and outlines the typical structure of a summary essay.