A bird's feathers represents more than just gaudy plumage. In many cultures across the globe, feathers are believed hold spiritual power, as such, they are integral parts of many tribal rituals. From as far back as the early days of mankind, humans have always valued feathers for their beauty.
Professional certification, trade certification, or professional designation, often called simply certification or qualification, is a designation earned by a person to assure qualification to perform a job or task.
Definition of credential. 1  1 : something that gives a title to credit or confidence; also : qualification 3a the applicant with the best credentials. 2  2 credentials plural : testimonials or certified documents showing that a person is entitled to credit or has a right to exercise official power a doctor's credentials. 3  3 : certificate, diploma.