tag.php

<?php
/**
 *******************************************************************************
 * //tag.php
 *******************************************************************************
 *
 * The template for tag archives.
 *
 * CODEX REF
 * https://codex.wordpress.org/Tag_Templates
 *
 * @author
 * @copyright
 * @link
 * @todo
 * @license
 * @since
 * @version
**/
?>

<?php get_header(); ?>

<div class="jumbotron jumbotron-fluid">
    <div class="container">
        <h1>Tag: <?php the_title(); ?></h1>
    </div>
</div>

<div itemscope itemtype="http://schema.org/CollectionPage">
    <div class="container">   
        <div class="row">
            <div class="col-md-9">

                <?php if ( have_posts() ) : while ( have_posts() ) : the_post(); ?>

                    <article class="post" >
                        <h2><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></h2>
                            
                        <p><em>
                        By <?php the_author(); ?> 
                        on <?php echo the_time('l, F jS, Y');?>
                        in <?php the_category( ', ' ); ?>.
                        <a href="<?php comments_link(); ?>">
                        <?php comments_number(); ?>
                        </a>
                        </em></p>

                        <?php the_excerpt(); ?>
                    </article>

                    <hr>

                <?php endwhile; else: ?>

                    <div class="page-header">
                    <h1>Oh no!</h1>
                    </div>

                    <p>No content is appearing for this page!</p>

                <?php endif; ?>

            </div>

            <?php get_sidebar( 'blog' ); ?>

        </div>
        
    <?php theme_pagination(); ?>
    </div>
</div>

<?php get_footer(); ?>