Low cost, effectively avoid malicious clicks: general search engine bidding promotion is calculated according to the number of clicks. Let's do a statistic. If the lowest price of "wedding" keyword in a search engine is calculated as 1.90 yuan/time, and the average number of hits per day is calculated as 60-80 times, the daily cost is about 133 yuan, which is about 50,000 yuan a year. Search engine optimization can not only achieve good results in multiple search engines at the same time, but also pay no click fee regardless of the number of clicks per day. Wide coverage: According to statistics, more than 70% of website visits are recommended by search engines, and more than 90% of netizens often use search engines to find the information they want. The effect of search engine optimization can be seen in multiple search engines at the same time, covering almost all netizens.