Read the following paragraph, and then respond the next three questions referring to it:
Search Engine Optimization, commonly known as SEO, is a crucial digital marketing strategy that aims to improve a website's visibility on search engine results pages (SERPs). It involves various techniques, such as optimizing content, using relevant keywords, and building high-quality backlinks. The primary goal of SEO is to enhance a website's organic (non-paid) traffic by ranking higher in search engine rankings. By doing so, businesses can increase their online presence, reach a larger audience, and ultimately boost their revenue. SEO is a dynamic field that constantly evolves with changes in search engine algorithms and user behavior.