The document explains Google's search engine algorithm, defining it as a complex sequence of instructions that is frequently updated to provide users with relevant results and eliminate harmful content. It outlines reasons for website penalties, such as link manipulation and poor site design, and how to identify if a website has been penalized. Additionally, it highlights three major algorithm updates: Panda, Penguin, and Hummingbird, explaining their impact on search rankings and quality assessment.
Related topics: