AndrewUlrich

<p>This plugin creates two widgets:</p>
<ol>
<li>A widget where you can choose from all the categories in your blog.</li>
</ol>
<p>This is similar to what newegg.com uses, where you can select multiple categories, and it will only show posts belonging to all the categories you select, and such categories can be narrowed down by selecting their subcategories.</p>
<ol>
<li>A widget where you can choose from all the tags in your blog</li>
</ol>
<p>You can select the tags you want to search for, and it will only show posts that have all of the tags you selected.</p>
<h3>Known Issues</h3>
<p>After upgrading from 2.1 to 2.2 it is highly recommended that you deactivate the plugin and then re-activate it.  Unfortunately WordPress 3.1 no longer calls register_activation_hook when the plugins are upgraded, so this may be necessary, otherwise you may not see all your categories.</p>
<p>When using version 3.2 or above, and excluding categories, the display order may or may not be mixed up when you exclude a parent category.</p>


Faceted Search

This plugin will create widgets that you can use to conduct faceted searches using the categories or tags on your site.

JS Morisset

<p>The JSM Show Term Metadata plugin displays term (ie. categories, tags, and custom taxonomies) meta keys and unserialized values in a metabox at the bottom of the term editing page.</p>
<p>There are no plugin settings – simply install and activate the plugin.</p>
<h4>Shows Yoast SEO Term Meta</h4>
<p>Yoast SEO stores its term (ie. categories, tags, and custom taxonomies) metadata in the WordPress options table, not the term meta table.</p>
<p>The JSM Show Term Metadata plugin can read and display Yoast SEO’s term metadata, but it cannot be deleted (as it does not reside in the WordPress term meta table).</p>
<h4>Available Filters for Developers</h4>
<p>Filter the term meta shown in the metabox:</p>
<pre><code>'jsmstm_metabox_table_metadata' ( array $metadata, $term_obj )
</code></pre>
<p>Array of regular expressions to exclude meta keys:</p>
<pre><code>'jsmstm_metabox_table_exclude_keys' ( array $exclude_keys, $term_obj )
</code></pre>
<p>Capability required to show term meta:</p>
<pre><code>'jsmstm_show_metabox_capability' ( 'manage_options', $term_obj )
</code></pre>
<p>Show term meta for a taxonomy (defaults to true):</p>
<pre><code>'jsmstm_show_metabox_taxonomy' ( true, $taxonomy )
</code></pre>
<p>Capability required to delete term meta:</p>
<pre><code>'jsmstm_delete_meta_capability' ( 'manage_options', $term_obj )
</code></pre>
<p>Icon for the delete term meta button:</p>
<pre><code>'jsmstm_delete_meta_icon_class' ( 'dashicons dashicons-table-row-delete' )
</code></pre>
<h4>Related Plugins</h4>
<ul>
<li><a href="https://wordpress.org/plugins/jsm-show-comment-meta/" rel="ugc">JSM Show Comment Metadata</a></li>
<li><a href="https://wordpress.org/plugins/jsm-show-order-meta/" rel="ugc">JSM Show Order Metadata for WooCommerce HPOS</a></li>
<li><a href="https://wordpress.org/plugins/jsm-show-post-meta/" rel="ugc">JSM Show Post Metadata</a></li>
<li><a href="https://wordpress.org/plugins/jsm-show-term-meta/" rel="ugc">JSM Show Term Metadata</a></li>
<li><a href="https://wordpress.org/plugins/jsm-show-user-meta/" rel="ugc">JSM Show User Metadata</a></li>
<li><a href="https://wordpress.org/plugins/jsm-show-registered-shortcodes/" rel="ugc">JSM Show Registered Shortcodes</a></li>
</ul>


JSM Show Term Metadata

Show term metadata in a metabox when editing terms - a great tool for debugging issues with term metadata.

Faceted Search vs JSM Show Term Metadata