Shorten the path to a string that is only as long as needed to be unique, with a minimum length of 4 characters. Use this method if sensitive information would not be exposed if a short Dynamic Link URL were guessed.

Shorten the path to an unguessable string. Such strings are created by base62-encoding randomly generated 96-bit numbers, and consist of 17 alphanumeric characters. Use unguessable strings to prevent your Dynamic Links from being crawled, which can potentially expose sensitive information.