I have added a header element with the following code ->
<header class="entry-header">
<h1 class="entry-title" itemprop="headline">{{post_title}}</h1>
<div class="hero-meta">
<p style="font-size:14px">Updated on {{post_date}} by {{post_author}} </p>
</div>
But I want to accomplish a few more things ->
1) Remove the link from author-name
2) Add author avatar
3) Use the “Post title” H1 font size and not the normal h1
No SEO implications.
The Single Content Title (H1) has its own Customizer > Typography controls. The entry-title is just a CSS class that is used to apply those styles.