Which aspect is crucial to the effectiveness of a slogan in marketing, as suggested by the Marilyn’s Modeling Studio ad?

Simplicity is indeed a crucial aspect of an effective slogan in marketing. A simple slogan is memorable, easy to understand, and can quickly convey the brand's message or unique selling proposition to potential customers. When a slogan is straightforward, it resonates more with the audience, making it easier for them to recall it later.

In the context of Marilyn's Modeling Studio, a simple slogan would encapsulate the essence of the studio's brand and offerings without overwhelming the audience with complicated wording or concepts. The simplicity allows for quick comprehension and recognition, which is vital in a marketing environment where customers are bombarded with information. This clear communication can significantly influence consumer behavior, making them more likely to engage with the brand.

The other aspects mentioned—descriptive language, length, and repetition—can have their own roles in marketing, but they do not have the same immediate impact on memorability and clarity that simplicity provides in a slogan.