What is church community and why is it so important to God?

Acts 2:42, “And they steadfastly persevered, devoting themselves constantly to the instruction and fellowship of the apostles (the life together), to the breaking of bread [including the Lord’s Supper] and prayers.”

The Greek word here for fellowship is “Koinonia” which is the exact same word used in 1 John 1:6-7, “[So] if we say we are partakers together and enjoy fellowship with Him when we live and move and are walking about in darkness, we are [both] speaking falsely and do not live and practice the Truth [which the Gospel presents].But if we [really] are living and walking in the Light, as He [Himself] is in the Light, we have [true, unbroken] fellowship with one another, and the blood of Jesus Christ His Son cleanses (removes) us from all sin and guilt [keeps us cleansed from sin in all its forms and manifestations].”These two sections in Scripture are not talking about simple friendships, casual acquaintances or mere associates.
The term, “fellowship” was not a title or name for the Christian church in Jerusalem – it was a description of its central character as one of associating and sharing in a common life. Fellowship is never passive in the meaning of koinonia, it is always linked to action, not just being together, but also doing together. With fellowship comes a close and intimate relationship embracing ideas, communication, and frankness, as in a true, blessed interdependent friendship among multiple group members.Church is not just something you simply attend, it is something you are a part of and it is a part of you.  It is meant to go much deeper than surface pleasantries exchanged once a week.  In a world where community has been disappearing for the last couple of decades, we have what the world needs and most of us Christians don’t even know it!The church needs to be the greatest example of what the world needs on all levels.