For an employer they can offer flexibility to cope with fluctuations in staffing requirements by providing a pool of individuals who can be called upon in addition to the main workforce.
Ar gyfer cyflogwr gallant gynnig hyblygrwydd i ymdopi â gofynion staffio sy'n amrywio drwy ddarparu cronfa o unigolion y gellir galw arnynt yn ogystal â'r prif weithlu.