The string provided appears to be a in Wallet Import Format (WIF).
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...
Some online challenges or "hidden" treasure hunts provide partial or full private keys for users to find and claim a prize. The string provided appears to be a in
Developers using dummy keys for testing software on the Bitcoin network. cDWFjmPB2JVi1wN4gciWAXjMeGrCjkaqlcquWEiAGIZ9Zzp...