The element that is not part of the traditional marketing mix (often referred to as the "4Ps" of marketing) is:

2. Public

The traditional marketing mix consists of:

1. Product: This involves the design, features, and quality of the product or service being offered.

2. Price: This refers to the pricing strategy, including the price point at which the product or service is sold.

3. Promotion: Promotion encompasses the marketing and advertising strategies used to promote the product or service to the target audience.

The "public" is not typically included as a core component of the marketing mix, but it may be related to public relations or the target audience. Public relations and understanding the public's perception of the product can be important in marketing, but they are often considered separate from the traditional 4Ps.