Check out example codes for "what does the html tags mean in html". It will help you in understanding the concepts better.
Code Example 1
<!DOCTYPE html>
<html>
<!-- your code here -->
</html>
<!-- html tag is a non-self closing tag in html, it represents the beginning
and end of your entire code.All the other tags, elements, attributes,etc.
comes between html tags.
The HTML <doctype> tag is used to tell the browser which version of
HTML the document is using. It has no end tag (self-closing tag).
For HTML5 version we write <!DOCTYPE html>.
-->
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