A cultural perspective is viewing a situation or concept through the eyes of an individual's native environmental and social influence. It is the influence that a culture and society has on a person's worldview and perspective. This is an important concept in social sciences because it is important to consider how an individual or group may perceive something based on the cultural and societal norms that they are used to.
For example, when creating a product it is important to consider the cultural perspective of the different groups of people who may purchase it. The two fingered 'peace sign' in the United States is actually an offensive gesture in England, Ireland, and Australia. So an advertising executive making ads for a US company which will air in Britain would be wise to adopt a cultural perspective for the group and not show people giving the American peace sign in their ad!