Customs are human traits that are practiced via the science or art of buying, selling, trading, exporting, importing and making money which takes place in a given region or society.

The cultivated practices which customizes a person’s cultural traits of buying or selling.

These customs are also regulated and taxed by the laws of the government in which they exist.

Each country has its own laws and regulations for the import and export of goods into and out of a country, which its customs authority enforces. …

A wide range of penalties are faced by those who break these laws. A customs duty is a tariff or tax on the importation (usually) or exportation (unusually) of goods.

The word customs could mean two things:

Customs is the place where the administration of things imported, exported, taxed etc are administrate and regulated.

But on the other hand;

Customs can be the human traits which practice the art or science of buying, selling, exporting and importing commonly done as a tradition which belongs to a certain group of people (community, clan or nation