Hi Zia Sayyad,
The Base64 are generally used to exchange encrypted data involving 2 applications through service calls.
If you have 2 applications
ApplicationA and ApplicationB
ApplicationA – a string value will be encrypted using the Base64Encode java action and the resulted string will be sent to ApplicationB
In ApplicationB after receiving the string – Using the Base64Decode – decodes the string and using it.
This is very high level information to be helpful
→ input the decrypted string and the return value is unencrypted
→ input is an unencrypted string and returns the value encrypted
This is the continuation of the comment provided above
For example: Let say PhoneNumber from the Employee object has been retrieved in the Encoded format in ApplicationB via service call.
Use Base64 decode java action and configure as below
Which will then decode the PhoneNumber from Employee - The result will be a decoded phone number which we can use in further logic based on the requirements.
Hope this helps!!