Marking is the process of indicating or highlighting specific information or features in a document or on an object. This can involve using symbols, colors, or annotations to draw attention to important details, making it easier for individuals to identify and understand key points. Marking is commonly used in educational settings, such as when students highlight text in books or take notes during lectures. In various industries, marking can also refer to labeling products or materials for identification and tracking purposes. For example, barcodes and QR codes are types of markings that help businesses manage inventory and facilitate sales transactions.