Final answer:
A summary is a condensed version of a longer text that reviews its main ideas. Key details should be included, and the approach to summarization may vary for different audiences.
Step-by-step explanation:
A summary is a condensed version of a longer text that reviews its main ideas. It is written in your own words and includes the most important details. When deciding what to include in a summary, focus on the main idea and key supporting details. It is important to prioritize information that is relevant to the main point of the original source. Summarizing the same information differently for different audiences can depend on their prior knowledge and interests. For example, a summary for children may include simpler language and explanations, while a summary for experts in the field may assume a higher level of knowledge.