SEO, or Search Engine Optimization, is the practice of optimizing a website or online content to rank higher in search engine results pages (SERPs). The ultimate goal of SEO is to increase the visibility of a website, so it can attract more organic traffic from search engines like Google, Bing, or Yahoo. SEO involves a variety of techniques, including optimizing website structure and content, building quality backlinks, improving website loading speed, researching and using relevant keywords, and analyzing website traffic data. SEO is important for businesses and individuals alike, as it can help them reach a wider audience, generate more leads, and ultimately drive more sales or conversions. A well-executed SEO strategy can also help establish a brand as an authority in its field, and boost its reputation and credibility in the eyes of its target audience.