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 order to get a German driver's license based on a license from any state in the USA, you must have had your stateside license for at least six months before coming to Germany. The German authorities may ask for some sort of proof of that.