First Normal Form (1NF) is a property of a relational database table that ensures data is organized in a way that eliminates duplicate entries and maintains atomicity. This means that each column in a table must contain only indivisible values, and each entry in a column must be unique. Essentially, 1NF requires that each piece of data is stored in its simplest form. To achieve First Normal Form, a table must also have a primary key, which uniquely identifies each row. This structure helps prevent redundancy and makes it easier to manage and query the data. By adhering to 1NF, databases can improve data integrity and efficiency.