Get rid of the “Category:”, “Tag:”, “Author:”, “Archives:” and “Other taxonomy name:” in the archive title
If you wish to show the title of the Page set as Posts page (at Settings > Reading) automatically as the title on the Posts page, change the above code to
add_filter( 'get_the_archive_title', 'my_theme_archive_title' );
/**
* Remove archive labels.
*
* @param string $title Current archive title to be displayed.
* @return string Modified archive title to be displayed.
*/
function my_theme_archive_title( $title ) {
if ( is_category() ) {
$title = single_cat_title( '', false );
} elseif ( is_tag() ) {
$title = single_tag_title( '', false );
} elseif ( is_author() ) {
$title = '<span class="vcard">' . get_the_author() . '</span>';
} elseif ( is_post_type_archive() ) {
$title = post_type_archive_title( '', false );
} elseif ( is_tax() ) {
$title = single_term_title( '', false );
} elseif ( is_home() ) {
$title = single_post_title( '', false );
}
return $title;
}https://wpdevdesign.com/how-to-remove-archive-category-etc-pre-title-inserts-in-archive-titles/