#3 - GOLF BALL COMPRESSION
Compression is a measure of how much the ball compresses or squashes against the clubface when struck. The amount of deformation affects the energy transfer from the club to the ball. The more a ball is compressed, the further it will travel as it rebounds off the club.
Most golf balls range between 40 and 100 in compression.
Low-compression balls tend to be softer and compress more easily to help beginners and higher handicap players with slower swing speeds create more distance.
Higher-compression balls are harder and are used by better players who can produce faster swing speeds to still achieve the distance while gaining better control.
If someone with a high swing speed uses a low compression ball they will compress it more than is ideal and it will not perform as well.
In colder weather a higher-compression ball will feel more like a rock and players may opt for a lower-compression ball to achieve more feel.
Manufacturers rarely advertise the compression rating, preferring to categorise through feel.