yossybunny

“Simple widget display conditions” is a plugin that sets display conditions for WordPress widgets. 
You can specify one by one on the widget page. 
Check the check box and specify the article or category ID.
<h3>License</h3>
Image 
banner-772×250.png / banner-1544×500.png / icon-128×128.png / icon-256×256.png 
license: CC0 from https://pixabay.com/ja/illustrations/%E9%B3%A5-%E6%94%AF%E5%BA%97-%E5%BA%A7%E3%82%8B-%E3%81%99%E3%81%9A%E3%82%81-3726473/

Simple widget display conditions Lite

"Simple widget display conditions" is a plugin that sets display conditions for WordPress widgets.

Thomas M

Advanced Ads

Max Bond

Use Fixed Widget to create sticky widgets, sticky blocks, and other elements that stay in the visible screen area when a user scrolls the page up or down.
Sticky widgets are more visible than unfixed widgets and therefore have a significantly higher click-through rate.
That’s why this option is worthwhile for ads or other elements that visitors should interact with. Meanwhile, Google also allows the integration of <a href="https://wpadvancedads.com/google-adsense-sticky-ads/" rel="nofollow ugc">sticky AdSense ads</a>.
<ul>
<li><a href="https://wpadvancedads.com/fixed-widget-wordpress/" rel="nofollow ugc">Manual and demo</a></li>
</ul>
<h4>Features</h4>
Fixed Widget is completely free of charge.
<ul>
<li>Sticky Widgets Use the Fixed Widget option on any widget and blocks in the sidebar</li>
<li>Sticky Elements Choose any element on your site and make it sticky</li>
<li>Margin Top allows you to stop sticky elements to cover floating menu bars</li>
<li>Margin Bottom pushes sticky elements up before they reach a certain distance towards the bottom window</li>
<li>Stop Elements push sticky elements up when they are scrolling into view</li>
<li>Stop Blocks defines blocks in your sidebar that push fixed blocks out of the page</li>
<li>Minimum Screen Width and Minimum Screen Height allow you to disable sticky behavior on small screens</li>
<li>Written in plain JavaScript for better performance</li>
</ul>
<h4>Compatibility</h4>
Theme requirements:
<ul>
<li><code>wp_head()</code> and <code>wp_footer()</code> functions in <code>header.php</code> and <code>footer.php</code> files</li>
<li>JavaScript errors could break sticky widgets</li>
</ul>

Fixed Widget and Sticky Elements for WordPress

I have used this plugin on my website for the last 5+ years and it always worked very well. Updates were always stress free and never broke any layout. 

With version 6 I had some layout issues and Thomas helped me fix it. It's really hard to make a plugin compatible with the vast amount of themes out there and I would have totally understood if he didn't want to spend the time to fix my specific issue. But I was in for a pleasant surprise. 

I recommend this plugin and I wish him all the best. Thank you for your time and efforts. 

Kind regards,
Arun

Worked very well for the last 5+ years and impressive support

More attention and a higher ad performance with fixed sticky widgets.

Simple widget display conditions Lite vs Fixed Widget and Sticky Elements for WordPress