Your meta description acts as organic ad text. What this means is that when your ad ranks for a keyword, Google and other engines will often show the meta description as a summary of the page. This makes the meta description as important as ad text.
You should keep in mind that your visa will not necessarily include a residence permit and/or work permit. A so-called Schengen visa usually allows you to stay in Germany and other states within the Schengen area for up to 90 days. However, a Schengen visa does not permit you to take up any paid jobs in Germany.
In that case, you can apply for a visa to be able to take the examination in Germany. The requirement is that your future employer has made a firm job offer to you if you pass the exam. You can find out more about the visa procedure from the German embassy in your home country. There, you can get more information about how to apply for the visa.