The “official rollout” of HTML 5 in October 2014 ignited renewed interests in an old SEO debate: whether or not using multiple H1 tags on a single page is bad for SEO. Depending on the school of thought, some designers debated the true use case. Likewise, some SEOs had a similar debate. We know H1 tags have value, to which some SEOs try desperately to insert several H1 tags on a page (usually with target keywords). I’ve seen H1 tags in breadcrumb trails, hidden behind wordless graphics, and pushed to the margin with CSS. But other SEOs, who worry about being seen as spammy, go with the “one H1 per page” rule of thumb. When one of our clients recently asked this question, we found ourselves reevaluating and realigning our multiple H1 best practices. We had to establish where we stand on the answer.