When you order goods from aHappyDeal, they are sent by airmail to your home country
As such, you are importing goods from one country to another. The formalities of the clearance of the goods through Customs will be taken care of by the courier in all normal cases.
However, as the importer you will need to be aware of your responsibilities and find out information about import restrictions and any associated tax or duty issues in advance of placing the order(s).