Is there any difference between trademark and the name of a company or store?

The commercial name of a company or store represents the principal part of its business, which is equivalent to a person’s name, whereas a trademark is used to honor the source of the merchandise or services provided in the principal part of the business. The commercial name of a company or store can also be used as the trademark with the function being to identify the source but, other than simply showing the name of a company or store, a trademark also has the function for consumers to distinguish the merchandise or service source.