A lightweight decisions not options related posts plugin.

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Simple Shortcode Similar Post

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Automatically Redirect any 404 page to a Similar Post based on the Title Post Type & Taxonomy using 301 or 302 Redirects!

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Post-Plugin Library

The shared code library for Similar posts, Recent Posts, Random Posts, Popular Posts and Recent Comments.

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M Similar Posts

This plugin lists similar to the current post based on the number of common categories.

divspark

Admin Title Check

Check whether the title matches other posts while adding or editing a post, page or custom post type in classic editor.

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Suggest 404 links

Appends "did you mean" links to your "404" page.

shawfactor

Quickly increase your readers’ engagement by adding related posts to the bottom of your post content.
Posts with the most terms in common will display at the top!
This plugin is capable of finding related posts in multiple taxonomies and post types. Include or exclude terms from the search for related posts. Change the look and feel by using your own templates in your (child) theme.
Additionally this plugin allows you to override the related posts that are automatically generated and choose your own related posts.
Requires wp_body_open
Note this plugin requires wordpress 5.2 and for your theme to support the wp_body_open hook (most good themes do).
Like this plugin? Please consider <a href="https://wordpress.org/support/view/plugin-reviews/lh-related-posts-by-taxonomy/" rel="ugc">leaving a 5-star review</a>.
Love this plugin or want to help the LocalHero Project? Please consider <a href="https://lhero.org/portfolio/lh-related-posts-by-taxonomy/" rel="nofollow ugc">making a donation</a>.
Plugin features:
<ul>
<li>Small Footprint. Unlike many other related post plugins this will have a minimal impact on site speed!</li>
<li>Highly Adjustable layout!</li>
<li>The ability to optionally manually set the related posts for each post in the post edit screen.</li>
</ul>

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