title: what is facebook app ID?
body: <p>Hi i'm trying to place a facebook like button in website With the following code</p>
  
  <pre><code>    &lt;div id="fb-root"&gt;&lt;/div&gt;
  &lt;script&gt;(function(d, s, id) {
    var js, fjs = d.getElementsByTagName(s)[0];
    if (d.getElementById(id)) return;
    js = d.createElement(s); js.id = id;
    js.src = "//connect.facebook.net/en_US/all.js#xfbml=1";
    fjs.parentNode.insertBefore(js, fjs);
  }(document, 'script', 'facebook-jssdk'));
  
  
  
    FB.Event.subscribe('edge.create',
           function(response) {
               alert("Thank you for liking my page"); 
           }
      );
  
  
  
  &lt;/script&gt;
  
  &lt;div class="fb-like-box" data-href="https://www.facebook.com/mypage" data-width="292" data-show-faces="true" data-stream="true" data-show-border="true" data-header="true"&gt;&lt;/div&gt;
  </code></pre>
  
  <p>But the FB.Event function not working when i tested, I think i can use this trigger event only if i use FB.init and running inside fbAsyncInit() function.this came to know by searhing web. </p>
  
  <p>i don't know these things exactly.Now the problem is Fb.init require appId,channelUrl and few more.I'm confused i didn't created any Application and i'm not creating i'm just trying to place a facebook like button to my website then how come can i provide appId.</p>
  
  <p>Can anyone explain me about this appId.Does it required to create like button and to create Fb.event when a user likes my page like thanking them or am i using the given code wrongly?</p>