Optimizley landing page banner has 2 h1 elements: <div class=header-container tooltip-container>  <h1 class=mkt-hero__header optly-header-one>Hello!</h1>  <h1 class=mkt-hero__header>Let&apos;s optimize digital experiences for your customers.</h1>  <span class=tooltip><!-- [] --></span></div>If I saw this in any other site I would dismiss it as bad practice. But Optimizely are a YC alumni that wrote the book on optimizing site performance. Does anyone know why they chose to use two h1 elements?
If multiple h1 elements are bad practice, how come Optimizely has more than one h1?
seo;html;h1
You're right. Two h1 elements in the same section is not a good idea, semantically or structurally, but it's not a HTML error. It's most likely a copy/paste error on their part but who knows why some people do what they do. Don't always look at any one company and think they write code perfectly in every way, all the time, no matter who they are.