Level B2 corresponds to independent users of the language, i.e. those who have the necessary fluency to communicate without effort with native speakers.
B2 level competencies
1) Can understand the main ideas of complex text on both concrete and abstract topics, including technical discussions in their field of specialization.
2) Can interact with a degree of fluency and spontaneity that makes regular interaction with native speakers quite possible without strain for either party.
3) Can produce clear, detailed text on a wide range of subjects and explain a viewpoint on a topical issue giving the advantages and disadvantages of various options.