The advantages and disadvantages of search engine marketing SEO and SEM are as follows: SEO cost composition: content planning fee, no advertising fee, SEO optimization specialist salary, product content planner salary, designer salary, and programmer salary. The advantages of SEO: no need to worry about malicious clicks, accidental clicks, no advertising fees, can promote business, efficiently operate, showcase brands, dominate brand screens, eliminate counterfeits and preserve authenticity, participate in competition, promote breadth, accurately acquire customers, and enhance business breadth. Disadvantages: High content requirements, continuous execution of SEO work content, and requirements for execution cycle. The common billing model for enterprises to carry out SEO is a fixed technical service fee plus performance rewards. SEM cost composition: content planning fee, advertising fee, SEM optimization engineer salary, product content planner salary, designer salary, programmer salary. The advantages of SEM: it can quickly promote business, operate efficiently, showcase brands, distinguish authenticity from falsehood, participate in competition, accurately acquire customers, and enhance business breadth. Disadvantages of SEM: It cannot avoid malicious clicks and accidental clicks. Whether encountering malicious clicks or accidental clicks, it will consume a large amount of advertising fees. Some keywords have strict requirements for advertisers and require corresponding qualifications to be provided. The common billing model for SEM in enterprises is fixed technical service fees plus performance rewards.

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