A design is a two-dimensional appearance (e.g. a painting or a wallpaper or a website) or a three-dimensional appearance (e.g. furniture or a sculpture), which has been produced by hand or industrially and is innovative and unique.
To protect designs, it is advisable to register them in a registry. This can be a national register (for example USPTO, DPMA) or an international one (EUIPO, WIPO). This registration provides a right to the design recorded in a register, the registration of which is advantageous in the event of a dispute.
This is because registered designs may not be used without your permission. If your design trademark was nevertheless used without authorization, it is possible to demand that the infringer cease and desist from the infringement and destroy the products manufactured by him. Furthermore, you are generally entitled to compensation for damages.