Users attempting to recover an old wallet from a printed "paper wallet" or backup.
If you are looking for the "piece" that corresponds to this key (such as the public address it controls), you would need to import it into a secure Bitcoin wallet or use a local offline tool to derive the public address. cDWFjmPB2JVi1wN4gciWAXjMeGrCjkaqlcquWEiAGIZ9Zzp...
Are you trying to for this key, or is this part of a specific online puzzle or game? Users attempting to recover an old wallet from