SEO (Search Engine Optimization) is the practice of optimizing a website or a webpage to improve its visibility and ranking in search engine results pages (SERPs). It is an essential part of digital marketing, as it can help businesses attract more organic traffic to their websites, generate leads, and increase revenue.SEO (Search Engine Optimization) is the practice of optimizing a website or a webpage to improve its visibility and ranking in search engine results pages (SERPs). It is an essential part of digital marketing, as it can help businesses attract more organic traffic to their websites, generate leads, and increase revenue.