Is so a coordinating conjunction

Yes, the Word so is a coordinating conjunction. It can also be a pronoun, adjective, or adverb.

There are seven coordinating conjunctions: for, and, nor, but, or, yet, so. They can easily be remembered by remembering the Word 'fanboys'. This Word is spelled out of the first letters of the coordinating conjunctions.

An example of the Word 'so' being used as a coordinating conjunction:

You have asked a question, so I have given an answer.