Entity properties are characteristics or attributes that describe an entity such as (name, description, currency, date, time, url, etc). Entity properties are used to provide additional information about an entity and help to define its meaning or significance within a particular context For example, a person entity might have properties such as "name", "age", and "address", while a product entity might have properties such as "name", "price", and "description". Entity properties are usually represented using key-value pairs in JSON-LD, with the key representing the property name and the value representing the property value. entity properties can also be used to define relationships between entities. For example, you might use properties to specify that a particular person is the "author" of a book or that a product is a "variant" of another product There are two types of properties: Simple types: the types that take text as input, such as name, description, URL date, time Complex type: the properties that can be described as another entity, for example, if you have an Organization type, the founder of the organization is a Person which is also another entity that has its properties. So this person can be described as the founder (relationship) of an organization