This will explain what is a high launch 3 wood.
The loft of a 3 wood is typically 15 degrees. A high launch 3 wood on the market today is the Callaway Rogue ST MAX 3HL (high launch), which offers a 16.5 degree loft.
A high launch 3 wood is one that's over 15 degrees of loft. , A high launch 3 wood typically has 16*-17* of loft, more than the standard 15* of loft. They also have weighting characteristics that help launch the ball higher. , A high launch 3 wood is a 3 wood with a launch angle over 17 degrees in order to have more forgiveness and be easier to hit.