Search engines determine website rankings through complex algorithms that assess various factors to deliver the most relevant and high-quality results to users. These algorithms consider factors such as relevance, authority, user experience, and technical aspects of a website. Relevance evaluates how well the content on a website matches the user's search query, taking into account factors such as keyword usage, topic relevance, and semantic context. Authority measures the credibility and trustworthiness of a website, determined by factors like backlinks from reputable sources, domain age, and user engagement metrics. User experience assesses how easy and enjoyable it is for users to navigate and interact with a website, including factors like site speed, mobile-friendliness, and usability. Technical factors include elements such as site architecture, HTML structure, and meta tags, which affect search engine crawling and indexing. By considering these factors, search engines rank websites based on their perceived relevance, authority, and user experience, aiming to provide users with the most valuable and helpful results for their search queries.