1.</article>
2.</section>
can use h1 elements at the start of each section,which would become a sub-heading of anything preceding that section
suggest sticking to the headings levels you would use if you didn’t use sections
3.provides a much richer, more meaningful document.
4.</header>
5.</footer>
6.</aside>related the content surrounding it
7.</nav>(navigation)designed for major groupings
8.HTML5Shiv can rescue
