Due to the platform version and function update, the specific operation steps may be different for the setting of the health priority setting of the US group takeaway. Generally speaking, businesses can set health preference top in the following ways:

1. Log in to the backstage of Meituan takeaway business and enter the business management interface.

2. Find the relevant options such as store management or commodity management, and select the commodities or dishes that need to set health preferences.

3. On the product or dish details page, find relevant labels or options, which may be displayed as "health preference" or similar options.

4. Check or select this option and confirm that it is set as the preferred toppings for health.

Now let's explain why the setting of Meituan takeaway is healthy and the first choice. Health optimization refers to the promotion and display of goods or dishes that meet certain health standards on the take-away platform. These commodities or dishes are usually low in oil, salt and calories, and rich in healthy ingredients such as vegetables and fruits. Health preferences are set for the following reasons:

1. Promotion of health awareness: Modern people pay more and more attention to health, and more people begin to pay attention to the health and balance of diet. Choosing healthy take-away dishes has become a trend. By setting health preference top, users' cognition and choice of healthy diet can be improved.

2. Meet the needs of users: More and more people order food on the take-away platform, and healthy eating is one of their needs. Through health optimization, it is convenient for users to quickly find dishes that meet health requirements and meet users' needs.

3. Promote the concept of health: Setting the top of health preference can promote the concept of healthy eating and encourage businesses to provide more healthy and balanced dishes. This will also help guide consumers to make healthier dietary choices and have a positive impact on the entire takeaway industry.

Generally speaking, by setting the top of health preference, Meituan take-out can meet users' needs for healthy eating, promote the concept of health, and promote merchants to provide more healthy food choices, thus enhancing the user experience and the development of the whole take-out industry.