title: meta charset = UTF-8 vs charset = iso-8859-1
body: <p>Why are we specifying <em>charset = &quot;UTF-8&quot;</em> in the <em>meta</em> tag?</p>
  <p>Is it mandatory to specify this in our web pages?</p>
  <p>Does it have any other value other than <em>utf-8</em>?</p>
  <p>And what is this <em>iso-8859-1</em>? Where and when should we use them?</p>