Rand Fishkin discusses changes in search engine optimization (SEO) and search engine results pages (SERPs) in 2018. Google controls over half of all web searches but distributes traffic across different domains relatively evenly. Features like featured snippets and knowledge panels now make up a large portion of clicks. Marketers must adapt by optimizing for these features through content, links and other signals. Personalization also plays a bigger role, as Google tailors results based on location, device and user history. Overall, SEO requires a focus on providing helpful answers rather than just links.