what does nominal scale and ordinal scale variable denotes?

Nominal Scale

A variable can be treated as nominal when its values represent categories with no intrinsic ranking; for example, the department of the company in which an employee works. Examples of nominal variables include region, zip code, or religious affiliation. A variable can be treated as nominal when its values represent categories with no intrinsic ranking; for example, the department of the company in which an employee works.

Ordinal Scale

A variable can be treated as ordinal when its values represent categories with some intrinsic ranking; for example, levels of service satisfaction from highly dissatisfied to highly satisfied. Examples of ordinal variables include attitude scores representing degree of satisfaction or confidence and preference rating scores.