WWJD stands for What Would Jesus Do, you can use these words as a personal motto to remind you to act the same manner as Jesus would do.
Take along this WWJD bracelet and remind you of your belief as a Christian and to make the good by following the teaching of Jesus.
WWJD - What Would Jesus Do
But What Would Jesus Do? This is what you can ask you if you don't know how to act in some situations
"For to this you have been called, because Christ also suffered for you, leaving you an example, so that you might follow in his steps."
1 Peter 2:21