When you get to the row in question the pattern wants you to -
Work 22 stitches, ie Knit or Purl 22 stitches depending on if the row is a knit or a purl one etc
Then the * (asterisk) indicates a REPEAT section.
So you repeat from the Asterisk (*) as many times as the pattern says. In your case it's the First time then Repeated 2 more times. So you do that 3 times in all - then finish knitting (or purling etc) all remaining stitches to the end of the row