Fasting - Quick & Clear Bible Study

What is fasting? Should believers fast? Is there a Biblical example for us to use today?

Verses used in this study:
Matthew 9:14,15
Acts 13:2
Acts 14:23
Matthew 6:16-18
Psalm 35:13
Ezra 8:21-23
Esther 4:9,15,16
Luke 18:10-14
Jeremiah 14:10-14
John 3:16