perhaps a little explanation is in order chaps.
The Runway number is usually correct to within 1 degree of the heading it is on.
A Runway 08 will be on a heading of 080 degrees.
So it tells you the direction of the runway.
The 330/15 format for wind is the wind heading (where it is coming FROM) and the wind-speed in Knots. In that example, it's coming from a heading of 330 degrees at fifteen knots.
Hope that helps,
Phil