1) The document discusses research analyzing Twitter usage in Germany from a big data perspective. It identifies approximately 9.2 million unique German-language Twitter accounts and over 2.4 billion tweets posted between September 2013 and 2015.
2) Various statistics and patterns are analyzed regarding German Twitter users, including distributions by country, state, and city. Activity patterns like number of tweets posted per day are also examined.
3) The research aims to better understand factors driving Twitter adoption in Germany, map the German-language Twitter network, and analyze how information spreads. A collaborative news index of German tweets (DETNIX) tracing sharing of news links is also described.