Search Engine Optimisation (SEO) is the process of improving a website's visibility in search engine results pages (SERPs) to increase organic (non-paid) traffic. It involves optimizing content, structure, and technical aspects of a website to help search engines understand and rank it more effectively.
Search Engine Marketing (SEM) is a form of digital marketing focused on increasing a website’s visibility in search engine results through paid advertising. While SEO targets organic rankings, SEM specifically involves paid methods, primarily through platforms like Google Ads or Microsoft Ads.