An instructional guide is important for selling a product because without clear instructions, a product will not sell well. The guide should outline the topic, list supplies needed, provide step-by-step instructions written in short, clear sentences using simple words. It is also important to test the guide by following it yourself. Customers should study the instruction manual before using a product so they understand how to use it and get help if problems arise. An example is provided of a computer needing an instruction guide so customers understand how to use it and can solve problems that come up.