Google’s algorithm updates are often named after animals. Which option shows the names of some important updates?

According to Vitor Peçanha, co-founder of content marketing-specialized firm Rock Content, these updates aim at offering the best possible content to Google users. According to him, the Panda update focused on filtering pages with poor content (little relevant information, lots of keywords). Penguin focused on tracking and penalizing pages that tried to manipulate search results by using backlinks. Finally, Hummingbird enabled the algorithm to analyze content semantically and rank pages according to the quality of their content.