Bar lines are drawn across the staff, dividing the music into sections called Bars or Measures. A double bar line signifies the end of an important section of music, while a final bar line is written at the end of a piece.
These two numbers are called the four four time signature.
The time signature is written immediately after the treble clef.
The * time signature tells you there are four beats in each bar.
There are four quarter notes in one bar of music in * time.