Marcus Downing

Add page-specific widget areas to templates with a <code>Sidebars:</code> header:
<pre><code><?php
/*
Template Name: Photos template
Sidebars: notes (Photo Notes)
*/
...
</code></pre>
Use these sidebars the normal way:
<pre><code>dynamic_sidebar('notes');
</code></pre>
At present this only works on Pages.

Post-Specific Widgets

Add page-specific widget areas to templates with a Sidebars: header:

Automattic

WooThemes

Matt Cohen

With WooSidebars, it’s possible to change the widgets that display in a sidebar (widgetized area) according to a context (for example, a specific page, a specific blog post, certain categories or the search results screen). Setting up a custom widget area to display across multiple conditions is as easy as a few clicks.
Looking for a helping hand? <a href="https://woocommerce.com/documentation/plugins/woosidebars/" rel="nofollow ugc">View plugin documentation</a>.
Looking to contribute code to this plugin? <a href="https://github.com/woocommerce/woosidebars/" rel="nofollow ugc">Fork the repository over at GitHub</a>. Please also read the CONTRIBUTING.md file, bundled within this plugin.

WooSidebars

WooSidebars adds functionality to display different widgets in a sidebar, according to a context (for example, a specific page or a category).

Post-Specific Widgets vs WooSidebars