In the sq4r method, what is the purpose of surveying?

An important essence of survey is to prevent overcrowding the reader's memory with different stories he read of previously.

Explanation:

SQ4R is an acronym which stands for Survey, Question, Read, Recite, Relate and Review. These items aid in learning. One can read more effectively and understand as well. Survey involves a peek at a chapter. Only the chapter's objectives, topic subheadings, picture captions and summary are important. This interesting peek gives you the reader, a hint before the real article is feasted on. One major essence of survey in SQ4R is it's ability to prevent overcrowding in the mind of the reader. During a survey, hints are picked up using keywords before the main article is supplied. Survey helps the reader with hinted on what to expect when the real article is ready. It kind of grants the reader an alternative from overcrowding his memory with different images belonging to different stories he read of previously.