With the continuous enhancement of online promotion awareness, more and more people are joining the ranks of online marketers. To win in fierce competition, we online marketers must achieve a thorough understanding of both ourselves and our competitors. "Know yourself" means deeply understanding the promotion status of your own website; "know your enemy" means fully grasping the promotion status of your competitor's websites. The promotion status of a website can be reflected through some relevant data. Yue Hao believes that if online promotion personnel can master the following nine major query tools, they will be able to conduct a more comprehensive understanding and analysis of a website, thereby formulating more reasonable promotion goals and strategies.