A format is a saved template (or file) that uses macros to organize the contents of data sent to a destination. Format types include HTTP formats and file formats. HTTP formats send data in a JSON object with a POST or GET method. File formats send data in a file by FTP. The macros used by each format let you set file names, define file headers, and organize the contents of a data file. In the Admin UI, you can create, save, and re-use formats when setting up destinations for customers.