The Knowledge Graph is a system added to Google Search and launched by Google on May 16, 2012. It is a knowledge base to provide more useful and relevant results to searches using a semantic-search technique. The Graph shows sets of links to external websites, general information (such as locations, reviews, opening hours etc.) and direct answers to questions. Information in the graph are extracted from multiple sources including structured data encoded in web pages using Microdata and JSON-LD formats.
From “strings” to “things”: Google endless quest for clarity
No one really knows for sure when and why did language arise in human history. As British anthropologist, Robin Dunbar suggests, language may have emerged to allow humans to build, foster and maintain relationships. That is what the “Gossip Hypothesis” states. Whether or not this theory holds true, we cannot deny to live in a chit-chat world. Yet in this chit-chatting we strive for clarity. When we ask a question, we don’t want answers. We want the answer! That is what Google Knowledge Graph is attempting to do since 2012. If out of the blue I say “you’re like Socrates,” chances are you’ll be thinking about the greek philosopher. Yet if I said that while playing soccer with my friends that would change everything! Why? Because Socrates + Soccer = Brazilian soccer player That may sound trivial for humans as we do it naturally, not for search engines!
Google Knowledge Graph leverages on the relationships between words and concepts to understand the context, thus assigning a specific meaning to a word.