If you don't know what a summary is, then this is all about summarising.
Today on 11.05.15, we read a book called Charlie's race, and on the 2nd page we had to find 3 key words. The key words were pigeon, race and Charlie. Out of these key words we made a sentence, the sentence was "Charlie is a pigeon and he is going to enter his first homing pigeon race of the season." That is an example of a summary.
Also key words help you to make sentences or even stories!! You can find key words in every book!. Also if you copy someone's story it is called plagiarism.