Google Hummingbird is Google's search algorithm update announced in 2013 that aims to deliver faster and more precise search results. It understands search queries in their full context and modifies queries to expand synonyms and find related information. The update improved Google's existing Penguin and Panda algorithms which focus on search ranking and quality respectively. Google Hummingbird introduced new types of semantic, conversational, and glass-based searches to enhance the user search experience.