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.
If you are a citizen of another country, on the other hand, you will need to apply for a Germany work visa in advance and probably from your own country. Since 2005,the temporary residence visa also gives the right to work in Germany, which means applicants get more rights in one single visa.