How to Show Popular tag in your wordpress

//Put this code in your theme functions.php

    function wpb_tags() {
    $wpbtags =  get_tags();
    foreach ($wpbtags as $tag) {
    $string .= '<span class="tagbox"><a class="taglink" href="'. get_tag_link($tag->term_id) .'">'. $tag->name . '</a><span class="tagcount">'. $tag->count .'</span></span>' . "\n"   ;
    }
    return $string;
    }
    add_shortcode('wptags' , 'wpb_tags' );


    // How to use - [wptags]

    //little bit css to your style.css

    .tagbox {
    background-color:#eee;
    border: 1px solid #ccc;
    margin:0px 10px 10px 0px;
    line-height: 200%;
    padding:2px 0 2px 2px;

    }
    .taglink  {
    padding:2px;
    }

    .tagbox a, .tagbox a:visited, .tagbox a:active {
    text-decoration:none;
    }

    .tagcount {
    background-color:green;
    color:white;
    position: relative;
    padding:2px;
    }