Supermarkets belong to the service category in the trademark registration classification. Specifically, supermarkets can be classified into Class 35 of the International Trademark Classification System (Nice Classification System), which is the "Advertising, Sales Promotion and Business Management" class.

Class 35 includes various services related to commercial activities, advertising and sales promotion. This includes retail services, wholesale services, business intermediation services, business information and survey services, business management and organizational consulting, etc. Supermarkets, as commercial entities providing retail services, usually register their trademarks in Class 35.

However, it is important to note that trademark classification may differ from country to country. When actually applying for trademark registration, accurate classification selection should be made based on the classification system adopted by the local Trademark Office.

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