If, as a manufacturer, you wish to market your product in an EU country, applying for an ETA may make good sense. It gives you the possibility to prepare a declaration of performance and CE mark your product.
An MK approval is a voluntary Danish scheme for materials and structures. Even though your product is CE marked, it can also be MK marked to verify that it fulfils the Danish regulatory requirements.
There are nine stages in the process of obtaining an ETA. You can read about the stages here.
Read why Simpson Strong-Tie has chosen ETA-Danmark as their cooperation partner.