Post tag list

I would like to ask, how to post the tag list.

in the loop of the front page (index.php ?) or single posts (single.php) add <?php the_tags(); ?> https://codex.www.ads-software.com/Function_Reference/the_tags

where the list displays only Title and Content before MORE…

create a template tag.php https://codex.www.ads-software.com/Tag_Templates possibly starting with a copy of index.php (this depends on the structure of your theme);
then make sure to have the_content('read more'); https://codex.www.ads-software.com/Function_Reference/the_content within the loop https://codex.www.ads-software.com/The_Loop

for more detailed suggestions, please post more information such as the name of your existing theme and a link to your site.

Thanks for the links.
All I want is like this.

I will post an article about apple.
Below are the list of articles that have APPLE as tag.

Resolved

$tag = "apple";
$sql = 'tag=' . $tag .'&post_status=publish' . '&posts_per_page=0';
query_posts( $sql );

I used query_posts to list down all the articles that has an APPLE tag…