<u>Explanation:</u>
A summary has many ways to be written, but I'll stick with the basic and simple explanation.
A summary is usually only a paragraph long unless asked to write more than just a paragraph, which is unlikely. You start out with casually introducing the topic at hand, with a simple opening. Next you'll slowly lean more and more into everything that happened in the article or book you've read.
Basically you're going to be taking everything you had just read and narrowing down to the most important and big details in said reading material. Make sure to use proper writing etiquette; spelling, punctuation, grammar, etc.
Don't forget to add some quotes from the said article or book.
Hope This Helped!
If it was still unclear, I apologize.