: Indicates this is the second version of the resource pack.

If you are trying to display this correctly in your own pack.mcmeta file or a server description, ensure you use the symbol or the equivalent Unicode escape sequence \u00A7 depending on the file type. Formatting codes - Minecraft Wiki

The text you provided is formatted using . This specific string is likely intended for a file name, a server's "Message of the Day" (MOTD), or the title within a pack.mcmeta file for a Minecraft resource pack . Breakdown of the Formatting:

: The .rar at the end suggests this is the name of a compressed archive containing the pack files.

The symbol (section sign) followed by a character changes the appearance of the text that follows it: §5 : Dark Purple §l : Bold §d : Light Purple (Pink) §4 : Dark Red Rendered Text Appearance: