Entities: The Practical Definition
Session 1.1 · ~5 min read
Search for "apple" on Google. Before you see any web results, Google has already made a decision: are you looking for Apple Inc., the fruit, Apple Records, or Apple Bank? Each is a separate entity with a unique identifier in Google's Knowledge Graph. Google disambiguates instantly based on context, search history, and location.
Now search for your company name. Does Google disambiguate it from anything? Does it show a Knowledge Panel? Does it recognize your company as a thing with attributes and relationships? If not, your company is not yet an entity in Google's understanding. It is a string of characters that matches some web pages.
The Working Definition
An entity is anything Google can uniquely identify. Google's own patents define an entity as "a thing or concept that is singular, unique, well-defined, and distinguishable." This definition has practical consequences.
An entity is not a keyword, not a URL, and not a web page. It is a recognized thing in Google's Knowledge Graph with a unique identifier, properties, and relationships.
When Google recognizes something as an entity, it assigns a machine identifier (historically called a MID, or Machine Identifier, in the Knowledge Graph API). This identifier is stable. It does not change when your website changes. It is not a URL. It is a permanent reference to a thing in the world.
Entities vs. Web Pages
This distinction is critical. Your website is a collection of web pages. Your company is an entity. The web pages are containers where information about the entity lives. But the entity exists independently of any single web page.
Apple Inc. the entity exists across thousands of web pages, Wikipedia, Wikidata, news articles, government filings, and financial databases. No single web page is the entity. The entity is the thing all those pages are about.
Types of Entities
Google's Knowledge Graph categorizes entities into types. The main types relevant to business visibility are:
| Entity Type | Examples | Schema.org Type | Recognition Path |
|---|---|---|---|
| Person | CEO, author, founder | Person | Wikipedia, authored content, LinkedIn |
| Organization | Company, nonprofit, agency | Organization | Schema, GBP, citations, Wikidata |
| Local Business | Store, office, restaurant | LocalBusiness | GBP, local citations, reviews |
| Product | Software, physical product | Product | Product schema, reviews, merchant feeds |
| Creative Work | Book, article, course | CreativeWork | Schema, library databases, ISBN |
| Place | City, landmark, venue | Place | Geographic databases, Wikipedia |
Your business likely needs at least two entity types recognized: Organization (the company itself) and Person (the founder or key expert). If you have a physical location, add LocalBusiness. If you sell specific products, add Product.
The Entity Has Properties
An entity is not just a name. It has properties. An Organization entity in Google's Knowledge Graph can have: name, legal name, founding date, founders, headquarters address, industry, number of employees, logo, website URL, social profiles, parent organization, subsidiaries, and more.
Each property is a fact that Google stores and can use to answer queries, populate Knowledge Panels, and make connections. Missing properties mean a weaker entity signal. A company with only a name and URL is a much weaker entity than one with 15 verified properties.
The Entity Has Relationships
Entities do not exist in isolation. They connect to other entities through relationships. "Tim Cook is CEO of Apple Inc." is a relationship between two entities: a Person and an Organization. "Apple Inc. is headquartered in Cupertino" is a relationship between an Organization and a Place.
These relationships are what make the Knowledge Graph a graph, not a list. The more relationships your entity has to other recognized entities, the more firmly it is anchored in Google's understanding of the world.
Further Reading
- Entity Recognition in Queries at Google - Analysis of Google's entity recognition patents and their practical implications
- How Google Identifies Entities from Unstructured Content - Technical overview of Google's entity extraction systems
- What Is Entity Extraction - Google Cloud's documentation on entity extraction processes
Assignment
Search for "apple" on Google. Notice how Google disambiguates: Apple Inc., apple (fruit), Apple Records. Each is a separate entity with a unique identifier. Now search for your company name. Does Google disambiguate it from anything? If not, you are not yet an entity. Write down exactly what Google shows for your company name search.