In this tutorial by DrawlikeaSir, the author discusses three essential manga/comic effects that everyone should know. These effects include speed lines, motion blurs, and impact lines. The article highlights the importance of these effects in adding energy, movement, and drama to manga or comic artwork. Each effect is explained in detail, with step-by-step instructions on how to recreate them. By mastering these effects, artists can enhance their storytelling and create visually dynamic illustrations in manga or comic style.