The `<tbody>` element in HTML is used to group the body content of a table. It helps organize the rows of data within a table, making it easier to manage and style. The `<tbody>` tag is typically used in conjunction with other table elements like `<thead>` for the header and `<tfoot>` for the footer. Using `<tbody>` improves the accessibility and readability of tables, especially when dealing with large datasets. It allows developers to apply specific styles or scripts to the body section of the table without affecting the header or footer. This structure is essential for creating well-organized and visually appealing tables in web design.