title: Concerns, Decorators, Presenters, Service Objects, Helpers - Help me Understand Them
body: <p>There are few things in Rails:</p>
  
  <pre><code>## Concerns
  ## Decorators
  ## Presenters 
  ## Service Objects
  ## Helpers
  </code></pre>
  
  <p>Can anybody give me real problem example in what type of situation what should I follow, So I can have better understanding of these features.</p>
  
  <p>Examples will be better to understand the concept</p>
  
  <p>Thanks in advance and thanks for looking</p>