title: What is Scala's Simple Build Tool (sbt) and why is it used?
body: <p>I am new in Scala and I have to learn Scala and SBT, I read the sbt tutorial but i am unable to understand the use of sbt, for what purpose its been used.After reading this <a href="http://www.scala-sbt.org/0.13/tutorial/index.html" rel="noreferrer">tutorial</a> 
  I am still confused can any one will explain it in simple words, also suggest me if there is some tutorial for simple build tool </p>