Know how to capture the main points of something and present it briefly.
One good way to summarise is to translate what is being said into another representation such as a scene or diagram. The use of scene or diagram may help you to remember more and will help in summarising. Then extract just the main features from this diagram and leave peripheral features for a more detailed account.
The knowledge named 'Summarise' is considered to be rather important.
In addition, the knowledge is thought to be of average complexity but quite difficult to learn, it is generally learned from experience, and is mostly generally used knowledge.
Opinion is that it is slightly justifiable knowledge.