While it's a common phrase used in advertising and marketing, it doesn't meet the criteria of a strong slogan:
* It lacks memorability: It's a simple, everyday phrase.
* It doesn't convey a unique selling proposition: It doesn't tell you anything specific about a product or service.
* It's not action-oriented: It simply suggests a passive action.
A slogan should be catchy, memorable, and communicate a specific message about a brand or product.
Here are some examples of strong slogans:
* Nike: Just Do It
* McDonald's: I'm Lovin' It
* Apple: Think Different
To make "Sit back and relax" into a more effective slogan, you'd need to adapt it to a specific product or service. For example:
* For a spa: "Sit back and relax, your stress is our problem."
* For a travel agency: "Sit back and relax, we'll take care of the rest."