How does diversity training increase awareness building and skill building?

I think Skill building help managers to teach and conduct perfomrance appraisals with different cultures. This can be done through diversity training. I am not sure what it exactly means by awareness building

Awareness building trains people to be aware of the people, things, and knowledge around them. In this context, awareness building helps people understand the people they work with. This is especially important with a workforce from diverse cultures.