They are claimed to be the most effective means of drawing attention to one or more aspects of a product.
A political slogan generally expresses a goal or aim. Slogans are effective political devices especially in a heavily mediated context. They often summarize the essence of a platform effectively.
Slogans are used in heraldry, specifically in Scottish heraldry, in the same way as a motto is used. While mottoes may have several different origins, slogans are considered to originate as, or represent, war cries or battle cries. They usually appear above the crest on a coat of arms, though sometimes they appear as a secondary motto beneath the shield.