CSV (Comma-Separated Values) files have a standard MIME type of text/csv. According to RFC 4180, this is the formal definition for CSV files, so it is recommended to use this MIME type when transmitting CSV files over the network or on the Web. Using the correct MIME type helps browsers or other network services correctly identify and process the file content.
For example, if you host CSV files on a web server and wish for users to download or preview these files correctly via a browser, ensure that the Content-Type in the HTTP response header is set to text/csv. This allows the receiving application to process the file based on the MIME type, such as displaying it directly in the browser as a table or activating relevant CSV processing plugins.