In relational database models, the term relation refers to a table.
A table is a structured format where data is stored in rows and columns.
Each row (also called a tuple) represents a unique record, and each column represents an attribute or field of the record.
The relational model, introduced by E. F. Codd, treats every relation as a set of tuples with the same attributes.
Tables help maintain organized data with defined relationships through primary keys and foreign keys.
This tabular representation makes it easy to retrieve, manipulate, and maintain data efficiently in RDBMS systems.
So, a relation in this model is nothing but a table.