title: In CSS is there any need for backup fonts when applying custom fonts to a webpage?
body: <p>In CSS why is a backup font recommended if I am uploading a custom font for use with the webpage?</p>
  
  <p>I thought the backup fonts were only needed in case the client doesn't have the 1st/2nd/3rd..etc choice installed.</p>
  
  <p>For example if you have this code:</p>
  
  
  
  <pre class="lang-css prettyprint-override"><code>@font-face {
      font-family: MyCustomFont;
      src: url('../fonts/MyCustomFont.ttf');
  }
  </code></pre>
  
  <p>Why is this necessary?</p>
  
  <pre class="lang-css prettyprint-override"><code>body {
      font-family: MyCustomFont, Arial, Helvetica, sans-serif;
  }
  </code></pre>