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Knowledge Graphs, such as DBpedia, YAGO, or Wikidata, are valuable resources for building intelligent applications like data analytics tools or recommender systems. Understanding what is in those knowledge graphs is a crucial prerequisite for selecing a Knowledge Graph for a task at hand. Hence, Knowledge Graph profiling - i.e., quantifying the structure and contents of knowledge graphs, as well as their differences - is essential for fully utilizing the power of Knowledge Graphs. In this paper, I will discuss methods for Knowledge Graph profiling, depict crucial differences of the big, well-known Knowledge Graphs, like DBpedia, YAGO, and Wikidata, and throw a glance at current developments of new, complementary Knowledge Graphs such as DBkWik and WebIsALOD.