Skimming allows readers to quickly get a general impression of a text by focusing on key elements like subtitles and headings. Scanning is used to search a text efficiently when the reader has predefined keywords, noting page numbers of relevant passages. Intensive reading provides a deeper understanding of a text by reading in "chunks" at around 400 words per minute for short bursts with time to evaluate the information. These three reading strategies help readers adapt their reading based on different aims and text types.