SEO and SEM are both strategies to increase visibility in search engine results pages (SERPs).SEO focuses on optimizing websites and content to rank higher in organic search results, while SEM encompasses both organic and paid search marketing.SEO is a long-term strategy that aims to build authority and sustainable traffic, while SEM allows for instant visibility through paid ads on SERPs.Understanding the differences and similarities between SEO and SEM is crucial for developing an effective digital marketing strategy.