Slogans are catchy sentences or phrase that is easy to remember. Copywriters continuously for the sake of establishing it use it. It creates an impact of repetition. Gives an identity to the company or to the product.
It is part of the copy and is an effective and a concise manner of telling an idea. A slogan is necessary because they are:

• Direct
• Short
• Easily remembered
• Repeat the brand name
• Friendly phrases