Module 3: Entity & Knowledge Graph

Essential 13 Patents 2 hours

Entities are the new keywords. This module covers how Google understands entities, their relationships, and their salience in content.

Patents Covered

#	Patent	Year	Key Innovation
18	US 20120158633A1	2012	Knowledge Graph Foundation
19	US 20180046834A1	2018	Entity-Based Ranking Metrics
20	US 20150127617A1	2015	Entity Salience Scoring
21	US 9,251,141	2016	Entity Recognition Training
22	US 20150370804A1	2015	Contextual Entity Search
23	US 10169351B1	2019	Query Categorization
24	US 20160232149A1	2016	Entity Centrality Ranking
25	US 10332036B2	2019	Word Sense Disambiguation
26	US 20140143273A1	2014	Structured Info Generation
27	US 20220019908A1	2022	Enterprise Knowledge Graphs
28	US 12254033B2	2024	Knowledge Graph Search
29	-	-	Searching Quotes of Entities
30	-	2022	Entity Attribute Relations

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Core Concept: Entity Salience

Patent: US 20150127617A1THE mathematical definition of entity importance

What Is Salience?

Salience measures how IMPORTANT an entity is to a document's meaning. High salience = the document is ABOUT that entity.

How Salience Is Calculated

The patent describes using dependency graphs to determine entity importance:

1. Position - Earlier mentions = higher salience
2. Frequency - More mentions = higher salience
3. Centrality - Entity as subject of sentences = higher salience
4. Connections - Relationships to other entities = higher salience

The Salience Formula (Simplified)

Salience(E) = f(position, frequency, centrality, connections)

Example:

Factor	Article A	Article B
Position	First paragraph	Third paragraph
Frequency	12 mentions	3 mentions
Centrality	Subject of 8 sentences	Subject of 1 sentence
Salience	HIGH	LOW

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Patent 19: Entity-Based Ranking Metrics (US 20180046834A1)

How Entities Affect Rankings

Entity Metrics Used

1. Entity Match Score - Does document contain the query entity?
2. Entity Salience Score - Is the document ABOUT that entity?
3. Entity Relationship Score - How does entity connect to other relevant entities?
4. Entity Authority Score - Is this a trusted source for this entity?

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Patent 22: Contextual Entity Search (US 20150370804A1)

Context Signals

Signal	Description	Weight
Entity Distance	How close entities appear	High
Co-occurrence	Entities appearing together	High
Relationship Type	Named relationships	Medium
Temporal Context	When entities appear together	Medium

Building Entity Context

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Patent 24: Entity Centrality Ranking (US 20160232149A1)

Centrality Defined

An entity is CENTRAL when it's connected to many other relevant entities in content.

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Practical Application: Entity Optimization

Step 1: Define Your Entity

Create a clear, consistent entity definition:

Entity Name: [Your Brand]
Type: Organization/Person/Product
Attributes:
  - Name: [Official Name]
  - Founded: [Date]
  - Location: [Place]
  - Industry: [Category]
Related Entities:
  - [Founder Name]
  - [Product Names]
  - [Industry Terms]

Step 2: Establish Salience

Make your entity the SUBJECT of content:

DO

"Acme Corp provides enterprise software solutions. The company was founded in 2010..."

DON'T

"Enterprise software solutions are provided by various companies including Acme Corp..."

Step 3: Build Connections

Connect your entity to relevant entities:

Step 4: Maintain Consistency

Platform	Entity Name	Must Match
Website	Acme Corporation	Primary
Google Business	Acme Corporation	Primary
LinkedIn	Acme Corporation	Primary
Social Media	@AcmeCorp	Variation OK

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Entity Implementation Checklist

On-Page

• [ ] Entity appears in title tag
• [ ] Entity is subject of first paragraph
• [ ] Entity mentioned in H1 heading
• [ ] Entity connected to related entities
• [ ] Schema markup defines entity type

Site-Wide

• [ ] About page defines entity thoroughly
• [ ] Consistent entity naming across all pages
• [ ] Internal links use entity name as anchor
• [ ] Entity relationships documented

Off-Site

• [ ] Wikipedia article (if notable)
• [ ] Wikidata entry
• [ ] Google Knowledge Panel claimed
• [ ] Consistent NAP across directories
• [ ] Authoritative mentions from trusted sources

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Module Quiz

Question 1: What four factors determine entity salience?

Answer:

1. Position (earlier = higher)
2. Frequency (more mentions = higher)
3. Centrality (subject of sentences = higher)
4. Connections (relationships to other entities = higher)

Question 2: What's the difference between entity MATCH and entity SALIENCE?

Answer:

• Match = document contains the entity
• Salience = document is ABOUT the entity

Question 3: How do you increase entity centrality?

Answer: Connect your entity to many relevant related entities in your content, making it the hub of a topic network.

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Key Takeaways

1. Salience > Frequency - Being ABOUT an entity matters more than mentioning it
2. Position matters - Put entities early and as sentence subjects
3. Build connections - Link your entity to relevant related entities
4. Consistency is crucial - Same entity name everywhere

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Next Steps

Continue to Module 4: Query Understanding →

Learn how BERT and information gain affect what content ranks.