Whether you’re a webmaster or a web designer, there’s a question you’ve most likely either asked or answered many times over the years. That question is, “How many tags can I use per page, and how exactly should I implement them?” There are generally two reasons this question is asked. The first and most common is for SEO purposes; ensuring content is formatted in the best way possible to aid search engine indexing. The second is technical correctness; ensuring that markup is written in accordance with the appropriate W3C spec. With the advent of HTML5 the answer to this question has significantly changed in both SEO and technical regards. It’s now not only possible to have multiple level headings per webpage that will make sense to search engines, but in most cases it’s actually the recommended course. However, because the HTML5 spec is not all that widely understood yet, there is still a lot of advice floating around, some even written very recently, based on the rules of pre-HTML5 web design
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