How can i display a taxonomy? i have created a plugin and then a custom type. and a taxonomy , also i have register it

Try this one in your theme custom page or debugging page:

<?php

$args = array(
    'post_type' => 'offer',
    'posts_per_page' => -1 //show all posts
);

$loop = new WP_Query($args);


if($loop->have_posts()){
    while($loop->have_posts()){
        $loop->the_post();

    $id = get_the_ID();

    $tax = get_the_terms($id, 'hotel');

    print_r($tax);

    }//endwhile
    wp_reset_postdata();
}//endif