The term cruiser yacht refers to sailing or motor yacht

Yacht

A yacht is a recreational boat or ship. The term originated from the Dutch Jacht meaning "hunt". It was originally defined as a light fast sailing vessel used by the Dutch navy to pursue pirates and other transgressors around and into the shallow waters of the Low Countries...

s that were built for long distance sailing and offer enough comfort and space to live on the boat permanently. This would not allow to carry cargo

Cargo

Cargo is goods or produce transported, generally for commercial gain, by ship, aircraft, train, van or truck. In modern times, containers are used in most intermodal long-haul cargo transport.-Marine:...

 and, by definition, exclude racer yachts. Another feature that is often used to define the term is the fact that cruiser yachts can support a permanent crew.

Further reading