The primary difference is that Search Engine Optimization (SEO) focuses on optimizing a website for organic search results. Search Engine Marketing (SEM), on the other hand, aims to increase traffic and visibility through both organic and sponsored search. The sponsored search results and the organic search results are the two primary categories of Google’s search results. The purpose of SEO is to get your website to the top of the organic search results. You can also use pay per click to get your website listed in the paid section of the search results (PPC). When it comes to SEO, you should put your entire effort on ranking in the organic results. When you use both SEO and PPC to obtain traffic from search engines, you’re using SEM. SEM is a wide phrase that encompasses both SEO and PPC. As a result, SEO is classified as “under” the SEM umbrella.