Entity

An Entity is a distinct, well-defined thematic object that search engines recognize as an independent unit of knowledge — it can be a person, thing, place, or concept (e.g., Poland, Cortisol, Aquapark Krakow). In semantic SEO, entities replace keywords as the fundamental optimization unit. Each entity has attributes and relationships with other entities, creating a network of connections rather than isolated phrases. The shift from keywords to entities represents a fundamental fundamental change: we think about objects and their properties, not keyword phrases.

For example, in keyword SEO 'car', 'passenger car', and 'electric car' are three separate phrases, while in semantic SEO they're ONE entity with different attributes.

In practice, before you start writing content, define your site's Central Entity using the CSI Definition Helper skill — this is the first step of any content strategy. Entity is also a key element of the EAV model and Semantic Role Labels, where it should function as the Agent in sentences.