Indicate a place or means for an action or situation; 'at, in, on', 'using', or 'by means of'.
Long explanation:
The で grammar point is used to indicate a location, method, or tool for doing an action or for being in a situation. It can be translated as 'at, in, on', 'using', or 'by means of' in English. Nounで is formed by adding で after a noun.