Being in Germany gives someone that is attempting to learn German, the best experience for various different reasons.
You are being fully submerged into the language. In Germany, you are sure to be surrounded around others that know the language. Therefore, when you are using technology or other resources to learn the language, you will also have other resources surrounding you. For example, if you want to learn how to read road signs, you will have live road signs right in front of you in Germany. You can turn off the resources, such as your phone application, and look at the signs yourself. If you are not able to get through the signs fully, you have other resources around you that you can talk to using the language.
There will be a surplus of programs around that are focused on the German language. Just like in the United States where our schools offer a program to students that want to learn our native language, Germany has the same. Instead of being limited to what is being offered in your home country, you will have plenty of programs to pick from. Some of the programs that are offered in Germany include DAAD which is the German Academic Exchange Service and Congress Bundestag Youth Exchange Program (CBYX) for Young Professionals. Regardless of your current experience with the German language, there is sure to be a program that will meet your needs and requirements to help you learn the language.
There is plenty of opportunity to practice what you learn. If you remain within your native area, you may be limited to those that you practice using the German language with. There may not be much opportunity to use the langue outside of your learning area. Like the saying says, if you don’t use it, you will lose it. Being in Germany, there will be plenty of individuals walking amongst the streets that will allow you to put your learning to practice. You will have plenty of opportunity to use it. Also, hearing others using the language allows you to hear where you may be making pronunciation errors. It also allows you to hear how those that natively use the language are pronouncing certain words.