Both SEO and SEM are important marketing techniques to attract the attention of users to your website. SEO is a basic and most important way to improve the ranking of your web page in the organic and non-paid search engine result page (SERP). It includes techniques like on-page SEO, off-page SEO, and technical SEO. On the other hand, SEM is a part of SEO but it differs as it uses paid tactics to get at the top of the SERP. The techniques include setting up and optimizing ads, also known as the pay per click (PPC) technique, creating campaigns around key keywords. The only difference between the two is the speed. SEO is organic and takes time to show results in the Google SERP, whereas through SEM, you can achieve results quickly and get a better ranking in the SERP and user attraction.