What do the various proficiency levels mean?

These are proficiency levels defined by the CEFR (Common European Framework of Reference for Languages). The CEFR provides a clear, structured framework that is used globally to assess and define the language abilities of learners across various languages.
 
Intermediate (B1)
  • You can deal with most situations likely to arise while traveling in an area where the language is spoken
  • You can produce simple connected text on topics that are familiar or of personal interest
 
Upper Intermediate (B2)
  • You can interact with a degree of fluency and spontaneity that makes regular interaction with native speakers quite possible without strain for either party
  • You can understand the main ideas of complex text on both concrete and abstract topics, including technical discussions in their field of specialization
 
Advanced (C1)
  • You can understand a wide range of demanding, longer texts, and recognize implicit meaning
  • You can express ideas fluently and spontaneously without much obvious searching for expressions