1. An instructional guide is important for selling products because it provides comprehensible explanations and clarifies operational procedures so customers can easily use the product.
2. Key points of an effective instructional guide include using simple sentences, illustrations, addressing safety issues, documenting testing, and having others review the instructions.
3. An instructional manual should be studied before using a product to understand operational procedures, safety directions, address any doubts, properly use and understand the product, and know what to do if issues arise.