Search engine optimization (SEO) is the process of getting traffic from organic search results on search engines. SEO works by having search engine crawlers index website content so it can be found in relevant search results. Effective on-page SEO includes optimizing metadata, site architecture, keyword research and placement, image alt tags, and content. Off-page SEO such as link building, social media marketing, and content submissions also help improve search rankings. Regularly staying up-to-date on SEO best practices through blogs and tools is important for success.