The advantages of Cryptography are:-

-It hides the message and your privacy is safe.

-No one would be able to know what it says unless there's a key to the code.

-You can write what ever you want and how ever you want (any theme any symbol for the code) to keep your code a secret.

-You are able to use Cryptography during lessons without the teacher knowing. (BUT WILL TAKE LONG TO MAKE THE CODE, TO FIGURE IT OUT AND TO MAKE THE KEY)

The disadvantages of Cryptography are:-

-Takes a long time to figure out the code.

-It takes long to create the code.

-If you were to send a code to another person in the past, it will take long to get to that person.

-OVERALL CRYPTOGRAPHY IT'S A LONG PROCESS.