Unlike a spreadsheet, Airtable fields (columns) have specific "types" that allow you to store rich content in each record. For example, a table can contain records (rows) with attachments, long text notes, checkboxes, and links to records in another table.
With all of these different field types, you can configure a table to perfectly fit your needs! You configure the field type in the field customization menu.
Learn more about all the field types: