Describing a table in SQL is a fundamental task for database administrators and developers. It allows you to understand the structure of a table, including the names of columns, their data types, and any constraints that apply. This information is essential for data integrity and for ensuring that data is stored correctly. Knowing the structure of a table is also vital for writing effective queries and for understanding how data is organized. For instance, if you're building a report, knowing the data types of the columns helps you choose the right aggregation functions or formatting options. A well-defined table structure is a cornerstone of a robust database.