In doing marketing through search engines, we can choose SEO (Search Engine Opmization) services or SEM (Search Engine Marketing) services. The purpose of this service is to make our website appear on the first page of Google’s search engine. The difference if you use SEM services will appear on the ad pages, but if you use SEO services will appear on the search results page The following considerations in choosing SEO or SEM services Economically The SEM service is estimated to set a price of 1.8 million per month for approximately 50 medium level competition keywords or 21.6 million / year. SEO services have a keyword optimization price of 5 million / year for every 3 keywords with a moderate level of competition. If the keywords to be optimized are 50, then the cost = 50/3 x 5 million = 83 million / year. So economically, SEM services are cheaper than SEO services. Processing time The process of displaying SEM service advertisements is only 15 minutes after the creative is completed. Or if testing is done a maximum of 1 hour. The process of working on SEO to appear on Google takes 3 months. So the SEM service time is much faster to appear than SEO services Legality SEM services serve ads according to the rules created by Google’s search engine. SEO services try to display ads according to the gaps that exist in Google’s algorithm. Of course Google is trying to update its algorithm so it is not manipulated by others. So SEM services are safer because they follow the rules of the search engines, while SEO services are tricky against gaps in search engine algorithms Conclusion: 1. Economically, SEM services are cheaper than SEO services. 2. In time SEM services appear much faster than SEO services 3. So SEM services are safer because they follow the rules of the search engines, while SEO services are tricky against gaps in search engine algorithms.