What is Semantic Search? How Google Uses Semantics to Rank Content in 2025

Semantic search is not just a feature—it’s the foundation of how search engines interpret queries and rank content today.

In this blog post of our Semantic SEO series, we’ll decode what semantic search really means, how it evolved from keyword matching, and how it powers Google’s entire search infrastructure in 2025. You will learn why understanding entities, context, and relational databases is essential if you want your content to survive and thrive in the current SEO ecosystem.

“More data = more meaning = better ranking = more revenue — for both Google and you.”

What is Semantic Search?

Definition: Semantic Search = Meaning Over Matching

Semantic search is the process by which a search engine:

• Understands the user’s intent
• Deciphers the context of the query
• Matches it with content using entity recognition and relationship modeling

Unlike lexical search (which matches literal strings), semantic search understands that:

• “MNC vs Liverpool” likely refers to a football match
• “Jaguar” could be a car, animal, or NFL team, depending on context
• “Apple” might mean a fruit, a company, or a device brand

Google no longer sees words.
Google sees entities, nodes, and relationships.

ALSO READ …

• What is query semantics
• How do search engines work
• What is AEO (Answer Engine Optimization)
• How does Google rank articles
• Google helpful content guidelines

Core Technologies Powering Semantic Search

1. Graph-Based Databases

Google functions as a massive graph database, where:

• Nodes = Entities (e.g., Person, Place, Organization, Product)
• Edges = Relationships (e.g., friend of, located in, founded by)
• Properties = Metadata (e.g., age, population, price, category)

Example:

• Node: “Alice” → Property: Age = 28, City = New York
• Node: “Bob” → Property: Age = 31, City = San Francisco
• Edge: Alice → friend of → Bob

This is how Google stores and retrieves meaning-rich information in milliseconds.

2. NLP (Natural Language Processing)

Google uses NLP to:

• Parse query syntax and semantics
• Identify named entities (e.g., “Apple iPhone 15 Pro Max”)
• Interpret word variations (e.g., “last stop” vs. “final destination”)
• Resolve ambiguity using historical user behavior

NLP + Entity Matching = Understanding User Language with Machine Precision

Traditional Search vs Semantic Search

Factor	Traditional Search	Semantic Search
Matching Method	Keywords	Meaning & Intent
Focus	Strings	Entities & Relationships
Output	Indexed documents	Contextual answers
Data Structure	Flat list	Graph-based
Tools	TF-IDF, Keyword Planner	NLP API, Schema Markup, Topical Maps

How Google Processes Semantic Search in Real-Time

A Real Query Example: MNC vs Liverpool

Step 1: Entity Recognition

• MNC = Manchester City
• Liverpool = Football Club
• Query likely refers to a football match

Step 2: Contextual Disambiguation

• Could this refer to city comparisons?
  → No, based on browsing history and regional interest in football

Step 3: Semantic Matching

• Google returns a live match dashboard, not city statistics
• Shows scoreboard, team lineup, related news

Step 4: Result Coloring via Semantic Relevance

• Semantic signals determine:
  • What featured snippets to show
  • Which Knowledge Graph cards to activate
  • What order to rank documents

Semantic Matching in Action

Example: Jaguar

• As a Car Brand: Google prioritizes Jaguar Land Rover
• As an Animal: Image packs or Wikipedia articles
• As NFL Team: Location-dependent SERP triggers team cards

Why? Because Google uses:

• Query context
• User location
• Search history
• Entity graph strength

The Role of Structured Data in Semantic Search

To ensure content is understood semantically, you must:

• Use Schema Markup (JSON-LD)
• Define:
  • @type: Person, Product, Event, LocalBusiness
  • mainEntity: Core topic of the page
  • sameAs: External references to trusted knowledge bases

Schema = Communication layer between your content and Google’s entity index.

Key Elements of Semantic Search SEO

Element	Why It Matters
Entity Recognition	Helps Google classify your content meaningfully
Relational Modeling	Allows contextual relevance scoring
Node-Edge-Property System	Mimics how knowledge graphs work
NLP Context Mapping	Ensures intent and syntax are understood
Semantic Markup (Schema)	Tells Google what your content is about
Topical Maps	Builds domain-level authority around entity clusters

How to Feed Google’s Graph

The more accurate, rich, and current your data:

• The more semantically aligned your content becomes
• The faster Google can retrieve and rank your pages
• The more trust you build within Google’s knowledge ecosystem

“More structured data = more relevance = more ranking power.”

Update articles.
Add entity data (e.g., price, population, location).
Link entities together.
Use internal linking and external references.

Conclusion: Why Semantic Search is the Future of SEO

Semantic Search transforms SEO from keyword manipulation to meaning construction.

It empowers:

• Personalized search
• Entity-driven results
• Multilingual & multimodal understanding

Google has evolved into a knowledge engine, not just a keyword index.
To survive in 2025, your content must evolve too.

Coming in Part 7: How Do Search Engines Work? A Semantic SEO Perspective on Crawling, Indexing, and Ranking

Disclaimer: This [embedded] video is recorded in Bengali Language. You can watch with auto-generated English Subtitle (CC) by YouTube. It may have some errors in words and spelling. We are not accountable for it.