The document discusses the process of weeding or deselection in libraries, defining it as the examination of items in a collection to identify those for permanent removal based on specific criteria. It outlines reasons for weeding, which can include circulation patterns, space constraints, and curriculum changes, and factors for consideration such as condition, currency, and usage. Additionally, it highlights the challenges and politics involved in weeding, emphasizing the need for a well-thought-out plan and preparedness for potential community objections.