ThemeZee

The Custom Archive Titles plugin allows you to change the default texts of archive titles in WordPress.
<h4>Set custom titles on</h4>
<ul>
<li>Category Archives (Category: %s)</li>
<li>Tag Archives (Tag: %s)</li>
<li>Author Archives (Author: %s)</li>
<li>Yearly Archives (Year: %s)</li>
<li>Monthly Archives (Month: %s)</li>
<li>Daily Archives (Day: %s)</li>
</ul>
<h4>Examples</h4>
<ul>
<li>Published in News</li>
<li>Tagged with Books</li>
<li>Posts written by Jane Doe</li>
</ul>
<h4>Requirements</h4>
Your theme has to use <a href="https://developer.wordpress.org/reference/functions/the_archive_title/" rel="nofollow ugc">the_archive_title()</a> for showing archive titles.

Custom Archive Titles

A small and simple plugin to adjust the default texts of archive titles in WordPress

Weston Ruter

This plugin is developed at 
<a href="http://www.shepherd-interactive.com/" title="Shepherd Interactive
specializes in web design and development in Portland, Oregon">Shepherd 
Interactive</a> for the benefit of the community. No support is available. 
Please post any questions to the <a href="https://wordpress.org/tags/override-post-title-with-first-content-heading?forum_id=10" rel="ugc">support 
forum</a>.
On a singular post/page, normally in The Loop <code>the_title()</code> returns 
 post_title; if, however, this needs to be overridden so that a 
custom content heading is displayed (i.e. for SEO purposes), then an 
 h1 or <code>h2</code> element may be supplied at the beginning of 
the <code>post_content</code> and the contents of this heading element 
will be returned by <code>the_title()</code> instead of <code>post_title</code>.
From a technical perspective, the site title in the main header should be 
an <code>h1</code> element and the page/post title should in an <code>h2</code> 
element within an <code>article</code>, <a href="http://www.whatwg.org/specs/web-apps/current-work/multipage/sections.html#headings-and-sections" rel="nofollow ugc">per HTML5</a>:
<blockquote>Sections may contain headings of any rank, but authors are strongly 
encouraged to either use only `h1` elements, or to use elements of the 
appropriate rank for the section’s nesting level.</blockquote>
This is seen in the default WordPress theme and the HTML specifications. However, 
SEO places higher priority on the contents of an <code>h1</code> element, so if 
every page of a site has the exact same <code>h1</code> contents (the site name), 
then search engines may not be as likely to rank the page based on the unique 
contents of the <code>h2</code>. It has been <a href="http://blogsessive.com/blogging-tips/blog-seo-tips-titles/" rel="nofollow ugc">suggested</a> 
therefore that the <code>h1</code> and the <code>h2</code> elements be swapped, 
so that the site title appears in an <code>h2</code> and so that the unique page 
title appears in the <code>h1</code>. While the specifications don’t prefer this 
arrangement, it is not incorrect, also per HTML5:
<blockquote>Both of the documents are semantically identical and would produce the same 
outline in compliant user agents.</blockquote>
So if different heading levels are semantically equivalent, and if search 
engines really place that much importance on <code>h1</code>, then SEO wins.
In both cases, content section headings should be coded with <code>h3</code> and 
below.
Technical note: If the <code>$post</code> object is not passed into <code>the_title</code> 
filter, then the page’s <code>the_title()</code> must be called before every other 
 the_title() call <code>in_the_loop()</code>

Override Post Title with First Content Heading

On a singular post/page, returns the contents of the first content H1 or H2 instead of the post_title as normally. Facilitates SEO.

Custom Archive Titles vs Override Post Title with First Content Heading