what does the script tag do in html code example

Example 1: script tag with type html

<script type="text/javascript">
  /*Detects that you are using javascript or text*/
</script>

Example 2: what is the use of script tag in html

<script>
  //Insert JS scripts here
  var html
  html = "You can use the <script> tag to incorporate JS code into your HTML code"
  console.log(html)
</script>