Christhian Gruhh

With the Use Hashtags plugin, you can easily use hashtags in your content (and your excerpt). Just type # plus a word, and the plugin will automatically convert it to a link.
The link send the user to the website search page, showing additional content that also uses that hashtag.
This can enhance the user experience, as it creates a new navigation layer inside your content.
<ul>
<li>There is no need to maintain the hashtags, just add them to your text, and it’s done.</li>
<li>This plugin is non-destructive, so it does not make any changes to how your content is saved. Only when the content is presented, the link will appear for the visitors.</li>
<li>This plugin does not generate external links.</li>
<li>Tested with selected core blocks.</li>
</ul>
Tested with popular themes:
<ul>
<li><a href="https://wordpress.org/themes/twentytwentytwo/" rel="ugc">Twenty Twenty Two theme</a>.</li>
<li><a href="https://wordpress.org/themes/twentytwentyone/" rel="ugc">Twenty Twenty One theme</a>.</li>
<li><a href="https://wordpress.org/themes/generatepress/" rel="ugc">GeneratePress theme</a>.</li>
<li><a href="https://wordpress.org/themes/neve/" rel="ugc">Neve theme</a>.</li>
<li><a href="https://wordpress.org/themes/hello-elementor/" rel="ugc">Hello Elementor theme</a>.</li>
</ul>

Use Hashtags – convert #hashtags to search links

Use #hashtags as part of your content, and improve your UX.

Darkseal

IMPORTANT: This plugin requires Jetpack’s Publicize module: read below for additional info.
As the name says, this plugin will automatically append hashtags to any content sent by Jetpack’s Publicize module. This means that the plugin will work only if the Jetpack plugin is already installed on your WordPress platform with the Publicize module set to active. Don’t worry, tho: if any of these requirements are missing this plugin won’t do anything, without breaking your blog or compromising its performance in any way.
Plugin Features
<ul>
<li>Hashtags will be created using the post <code>tags</code>, (optionally) trimming the space chars, until the maximum character length is reached (if any).</li>
<li>You’ll still be able to manually add custom hashtags, pre-pending or appending them to the auto-generated ones just like you always did.</li>
<li>You can reorder the hashtags as you like, regardless of how they were added.</li>
<li>Dupe check included, ensuring that the same hashtag won’t be included multiple times – unless you manually do that.</li>
<li>Automatically added hashtags won’t break the 118-character limits of the social message text to keep the message length under the standard tweet + link limit.</li>
<li>The above character-length threshold can be changed and/or set to infinite with ease.</li>
</ul>
Useful Links
<ul>
<li><a href="https://plugins.svn.wordpress.org/publicize-with-hashtags/" rel="nofollow ugc">Plugin SVN Repository</a> hosted by WordPress.org (in real-time sync with the GitHub repo).</li>
<li><a href="https://github.com/Darkseal/publicize-with-hashtags" rel="nofollow ugc">Plugin GitHub Repository</a> (in real-time sync with the official SVN repo).</li>
<li><a href="http://darkseal.github.io/publicize-with-hashtags/" rel="nofollow ugc">Plugin GitHub Page</a>.</li>
<li><a href="http://www.ryadel.com/works/publicize-with-hashtags/" rel="nofollow ugc">Plugin official page</a> at <a href="http://www.ryadel.com/" rel="nofollow ugc">Ryadel.com</a>.</li>
<li><a href="http://www.ryadel.com/en/add-hashtags-to-jetpack-publicize-shared-posts/" rel="nofollow ugc">Installation & Usage Guide</a> at <a href="http://www.ryadel.com/" rel="nofollow ugc">Ryadel.com</a>.</li>
</ul>
<h3>Authors</h3>
<ul>
<li>Darkseal of <a href="http://www.ryadel.com/" rel="nofollow ugc">Ryadel.com</a>.</li>
</ul>

Publicize With Hashtags

Automatically append hashtags to content sent by Jetpack Publicize module. Hashtags will be created using post tags. Dupe and length check included.

Use Hashtags – convert #hashtags to search links vs Publicize With Hashtags