: Likely refers to compatibility with iOS 13.0 and optimized for iOS 14 (or "Funtouch OS 14/15" in some Android-adjacent security contexts).
If you are attempting to "download, verify, and secure" your device as the filename suggests, follow these industry-standard security protocols: : Likely refers to compatibility with iOS 13
: If a checksum (like SHA-256) is provided by the developer, verify it against the downloaded file to ensure it hasn't been tampered with. Enable Device Protections : : Likely refers to compatibility with iOS 13
: Indicates version 37 of the software, designed as a "universal" build (likely compatible with both iPhone and iPad). 64bit : Compiled for modern 64-bit ARM processors. : Likely refers to compatibility with iOS 13