Skimming is used to quickly identify the main ideas of a text. When you read a newspaper, you’re probably not reading it word-by-word, instead you’re skimming the text. Skimming is done at a speed three to four times faster than normal reading. People often skim when they have lots of material to read in a limited amount of time.
There are many strategies that can be used when skimming. Some people read the first and last paragraphs using headings, summarizes and other organizers as they move down the page or screen. You might read the title, subtitles, subheading, and illustrations. This technique is useful when you're seeking information rather than reading for comprehension.