The advertisements placed on portal sites are a form of point-to-surface dissemination, unable to pinpoint precise users for targeted marketing. They can only be designed for the majority of users. On the other hand, search is initiated by the user; even if it's just one search, the first results that appear are promoted ads directly related to the content you searched for. Therefore, search represents point-to-point dissemination, allowing precision with every search and every user. This is what makes such advertisements valuable. There are cases where a single click in bidding can cost up to dozens of yuan, making the ad value over twenty times greater than that of portal sites.