Search Hero

Search Hero replaces the standard WordPress search with a better search engine. You’ll get faster more relevant results, and your users will thank you.
Your wordpress content will need to be indexed after plugin installation. Once the content is indexed, new and updated content will be kept up to date automatically.
The index process can be done from the plugin settings page, and also using wp-cli on the command line.
For large sites with many posts, using wp-cli is recommended. The command to index is <code>wp-cli search-hero index</code>

Search Hero replaces the default search with a better search that sorts by relevance.  Designed for fast performance, and large wordpress sites.

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Adjust WordPress search results to order by relevance, not by date.
Just install in the typical WordPress plugin way and it will adjust searches automatically, no settings needed.
Also adds a relevance score to the title of search results, which you can style via CSS (see FAQ).
Version 2.0 gives you more control, including:
<ul>
<li>Hide relevance scores in results titles and/or admin</li>
<li>Auto style relavence scores. So you don’t have to add float:right to your CSS!</li>
<li>Highlight search terms </li>
<li>Custom excerpt centered on the search terms found</li>
</ul>

Search Relevance

Adjust WordPress search results to order by relevance, not by date.

Search Hero vs Search Relevance