These levels prep you up for the most basic stuffs around day-to-day life. You can already introduce yourselves, and exchange information, thoughts, and opinions on routine topics.
With intermediate levels you are now comfortable understanding and exchanging information over familiar topics like work, profession, leisure. You are now at ease in understanding abstract topics and specialized discussions, above all express your opinions on the topics.
Congratulations! You are now able to comprehend difficult long text and conversations and can express yourself fluently and spontaneously on varied range of topics.