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Related articles by tag is a plugin that will display, after the post content, a list of links to posts that have the same tag. It is a great way to have the search engine index all your pages. 
You can tag pages as well so they can be part of the related articles. The plugin comes with a handy widget if you don’t want to use the shortcode. 
Use the shortcode [related-articles-by-tag] where you want the related articles to appear.
<h3>Known Issues</h3>
<ul>
<li>None at the moment.</li>
</ul>

Kingsley Ibietela Felix

Related posts everywhere — inline in your content, at the end, in RSS feeds, and in a floating sidebar.
Relatedly automatically finds and displays related posts to keep readers engaged, increase page views, and reduce bounce rate. Unlike other plugins, Relatedly places posts inside your content at natural breaks (not just at the bottom), shows them in a floating sidebar, and gives you built-in analytics to measure what works.
<h4>What Makes Relatedly Different</h4>
<ul>
<li>Inline Posts — Insert related posts between paragraphs at configurable intervals (up to 5 per article free). 3 themes included free.</li>
<li>End-of-Content — Show related posts after the article (up to 5 free). 3 layout themes included free.</li>
<li>Floating Sidebar — A sticky sidebar with 5 design variants and auto-refresh, available with paid plans.</li>
<li>Built-in Analytics — Click and impression tracking plus basic stats included free. Advanced charts, comparisons, and CSV export available with paid plans.</li>
<li>Email Reports — Weekly or monthly performance reports delivered to your inbox, available with paid plans.</li>
<li>Performance First — Pool-based queries ordered by date. Transient caching. Conditional asset loading. No slow random sorting.</li>
<li>Easy Customization — Change colours, fonts, spacing, and labels from the settings page. No coding needed.</li>
</ul>
<h4>Free Features</h4>
<ul>
<li>3 inline themes: Simple, Minimal, Featured</li>
<li>3 end-content themes: List, Simple List, Compact</li>
<li>Up to 5 inline posts and 5 end-content posts per article</li>
<li>Category, tag, or both matching</li>
<li>RSS feed integration with UTM tracking (up to 3 posts in feeds)</li>
<li>Post + page support</li>
<li>Exclude categories and tags</li>
<li>Configurable cache duration</li>
<li>77 inline + 50 end-content randomized labels</li>
<li>Click and impression tracking with basic statistics</li>
<li>WordPress Customizer-compatible styling</li>
<li>Current post exclusion</li>
</ul>
<h4>Paid Plan Features</h4>
<ul>
<li>+5 inline themes: Quote, Badge, Callout, Gradient, Card</li>
<li>+3 end-content themes: Masonry Grid, Carousel Slider, Timeline</li>
<li>Unlimited inline posts per article (up to 20 end-content posts)</li>
<li>Floating Sidebar — 5 design variants, auto-refresh, scroll-triggered display</li>
<li>Advanced Statistics Dashboard — charts, date filtering, CTR breakdowns, top posts, source analytics, comparison reports</li>
<li>Email Reports — weekly/monthly scheduled HTML reports</li>
<li>Manual Curation — hand-pick related posts per article</li>
<li>Custom Post Types — beyond posts and pages</li>
<li>Gutenberg Block — drag-and-drop related posts anywhere</li>
<li>Statistics Export (CSV)</li>
<li>RSS — up to 10 posts in feeds</li>
<li>Priority Support</li>
</ul>
<h4>Live Examples</h4>
See Relatedly running on real sites:
<ul>
<li><a href="https://animalofthings.com/dog-breeds-for-seniors/" rel="nofollow ugc">Animal of Things — Dog Breeds for Seniors</a></li>
<li><a href="https://homequirer.com/difference-between-dyslexia-and-autism/" rel="nofollow ugc">Homequirer — Dyslexia vs Autism</a></li>
</ul>
These example sites are owned by the plugin developer.
<h3>Support</h3>
<ul>
<li><a href="https://kraftysprouts.com/docs/relatedly/" rel="nofollow ugc">Documentation</a></li>
<li><a href="https://wordpress.org/support/plugin/relatedly/" rel="ugc">Support Forum</a></li>
<li><a href="https://kraftysprouts.com/contact/" rel="nofollow ugc">Contact</a></li>
</ul>
<h3>Credits</h3>
Built by <a href="https://kraftysprouts.com" rel="nofollow ugc">Krafty Sprouts Media, LLC</a>.
Third-party libraries included in this plugin: 
* <a href="https://github.com/Choices-js/Choices" rel="nofollow ugc">Choices.js</a> — MIT License 
* <a href="https://github.com/atomiks/tippyjs" rel="nofollow ugc">Tippy.js</a> — MIT License 
* <a href="https://github.com/floating-ui/floating-ui" rel="nofollow ugc">Popper.js</a> — MIT License 
* <a href="https://github.com/sweetalert2/sweetalert2" rel="nofollow ugc">SweetAlert2</a> — MIT License 
* <a href="https://github.com/flatpickr/flatpickr" rel="nofollow ugc">Flatpickr</a> — MIT License 
* <a href="https://github.com/chartjs/Chart.js" rel="nofollow ugc">Chart.js</a> — MIT License 
* <a href="https://github.com/DataTables/DataTables" rel="nofollow ugc">DataTables</a> — MIT License
<h3>Privacy</h3>
This plugin collects the following data when click tracking is enabled:
<ul>
<li>Source post ID (the post the visitor was reading)</li>
<li>Clicked post ID (the related post that was clicked)</li>
<li>Display type (inline, end_content, or floating)</li>
<li>Event type (click or impression)</li>
<li>IP address</li>
<li>User agent string</li>
<li>Timestamp</li>
</ul>
This data is stored in a custom table in your WordPress database. It is used solely for the statistics dashboard and email reports. It is never transmitted to external servers.
To disable data collection: Go to Relatedly → Settings → General and uncheck “Enable Click Tracking”.
Data retention: Rows older than 90 days are automatically deleted by a monthly scheduled task. The retention period is configurable in Settings.
GDPR: This plugin integrates with WordPress’s built-in personal data tools (Tools → Export Personal Data / Erase Personal Data).

Relatedly

Related posts inline, at end of content, and in a floating sidebar. Built-in analytics and multiple themes. No slow random sorting.

Related Articles by Tag Lite vs Relatedly