File extensions are suffix added to files to specify its type and format. Each suffix is different and defines the files.
Typically the format is filename + . + suffix.
File Extension Types
There are many different file extension types. Each is used to open a file with the recommended or linked program.
These are the most common file type extensions:
.MKV: Media File check how to open MKV file.
.Torrent: File used by the torrent clients. Check how to open torrent file.