I am validating my web page code in the W3Schools and it keeps giving me this error message:
Error: Start tag
headseen but an element of the
In your third line you have a before your start tag. Having a meta element after the start tag automatically opens the head element before the meta element, which causes your explicit tag to be detected as a duplicate.
Simply move your underneath the tag to resolve this error:
Index
(You can also remove the tag entirely and it would validate, too, but having a end tag without its start tag looks funny, even if the start tag isn't strictly necessary.)