There is an essential difference between the two:

Strictly speaking: tags are used to mark the categories or content of your goals, such as the keywords you determine for your goals. Tools that make it easier for you and others to find and locate their goals. Therefore, tea labels are keywords used to mark the attributes of tea.

Trademarks are used by producers and operators of goods on the goods they produce, manufacture, process, select or distribute, or by service providers on the services they provide, to distinguish goods or services. Origin: a sign with distinctive characteristics consisting of words, graphics, letters, numbers, three-dimensional logos, color combinations, or a combination of the above elements, and is a product of modern economy. In the commercial field, trademarks include words, graphics, letters, numbers, three-dimensional logos and color combinations, as well as combinations of the above elements, which can be applied for registration as trademarks. Trademarks approved and registered by the state are "registered trademarks" and are protected by law. Trademarks protect trademark registrants by ensuring that they have the exclusive right to identify goods or services, or to license others to use them for remuneration.