A search algorithm is the heart and soul of a search engine: the complex mechanism through which billions of web pages are analysed in order to find the one being queried with the most relevance and authority. Such an intricate set of rules and algorithms takes into account many factors that relate far beyond a simple match of keywords. Today’s search algorithms analyse the quality and relevance of the content, the number of backlinks pointing to a page, into account user experience metrics like bounce rate and time on site, types of websites, page loading speed, mobile compatibility, and other countless signals. These algorithms continuously evolve to help the search engine provide the best experience to the user. They try to understand an intent behind a search query as much as they can to produce relevant, useful, and informative results. It is hence necessary for any effective search engine optimisation (SEO) to have knowledge of how search algorithms work. Thus, doing extensive research and making your website and content according to the factors that these algorithms desire will serve a good purpose of increasing ranking in the search results.