how do I add a like box and like button to my page? [duplicate]

This question already has answers here: Closed 11 years ago.

Possible Duplicate:

How to implement the Facebook "Like" button for my website

I'm not understanding the "get started" directions for adding a like button and a like page t开发者_StackOverflow中文版o my page. can someone help me out?

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http://developers.facebook.com/docs/reference/plugins/like/

Like Button HTML

<script>(function(d){
  var js, id = 'facebook-jssdk'; if (d.getElementById(id)) {return;}
  js = d.createElement('script'); js.id = id; js.async = true;
  js.src = "//connect.facebook.net/en_US/all.js#appId=172873559454230&xfbml=1";
  d.getElementsByTagName('head')[0].appendChild(js);
}(document));</script>
<div class="fb-like" data-href="URL_GOES_HERE" data-send="false" data-width="450" data-show-faces="true"></div>

What do you mean by like page?