The purpose of writing an abstract and/or a critique is to allow a reader to survey the contents of an article without actually having read the article. It serves to give an overview to the reader, who can then decide whether to read the entire article or not. The difference between the abstract and the critique is that the critique includes your professional opinion while the abstract does not.
Abstract
The abstract allows you an opportunity to practice writing a brief, comprehensive summary of the contents of the article read and also the opportunity to survey the professional literature in social work and ...