A skill group is a collection of skills that are closely related in terms of their use, the training needed to master them, or some other factor. If you spend 1 skill point on a skill group as a whole, you gain one rank in each skill it contains. You can gain access to a skill group via your character class (or classes, if you are multiclassed). The skill group illustrates your overall training and exposure to several different abilities. It provides an efficient, easy way for you to build a character who is trained in the core skills and abilities that your class normally studies.