Relational models are a way to organize and manage data in databases. They use tables to represent data, where each table consists of rows and columns. Each row, or record, represents a unique entry, while columns represent attributes of that entry. This structure allows for easy data retrieval and manipulation using a language called SQL (Structured Query Language). In relational models, relationships between different tables can be established through keys. A primary key uniquely identifies each record in a table, while a foreign key links records from one table to another. This interconnectedness enables complex queries and ensures data integrity across the database.