SEO vs SEM SEO is the process of optimizing your website and its content to improve your visibility and rankings in organic search engine results. The aim of SEO is to increase the quality and quantity of traffic to your website through unpaid search results. This involves optimizing your website's structure, content, and technical elements such as site speed, mobile-friendliness, and metadata. SEM, on the other hand, is a broader term that encompasses various strategies used to increase visibility and traffic to a website through paid search engine advertising. It includes tactics such as Pay-Per-Click (PPC) advertising, display advertising, and social media advertising. Unlike SEO, SEM involves paying for traffic to your website. In summary, SEO is a strategy used to optimize your website for better rankings in organic search results, while SEM includes paid advertising strategies to increase your website's visibility in search results.