title: What does Github's 'merge into "Master"' mean?
body: <p>I am a beginner user of Github, and I would like to know what the meaning of "Merge into Master" is.</p>
  
  <p>Also, what does "Master" mean in this context?   </p>
  
  <p><a href="https://i.stack.imgur.com/BbHoN.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/BbHoN.png" alt="enter image description here"></a></p>