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This is a unofficial, basic WordPress plugin for the Matomo web analytics software platform. 
It adds the Matomo javascript code into every page of your website, so you don’t have to code PHP to add it to your templates.
It is based quite heavily on the (no more supported) Piwik Analytics WordPress plugin which itself is based on the (no more available) Google Analytics wordpress plugin by Joost de Valk.
The following options are supported:
<ul>
<li>matomo hostname</li>
<li>matomo path</li>
<li>site ID</li>
<li>option to control download tracking</li>
<li>option to exclude the admin user (probably you)</li>
</ul>
Please note, this plugin requires a self-contained Matomo installation somewhere under your control. It does not include Matomo itself.
See also <a href="https://matomo.org/" rel="nofollow ugc">The Matomo Website</a>.

Simple Matomo Tracking Code

This unofficial plugin adds the Matomo Web Analytics javascript code into the footer of your website. It has several useful options.

This plugin helps integrate your blogs twittering into Piwik (http://www.piwik.org) more tightly. Whenever you post a blog entry and Twitter Tools tweets your post, this plugin will add a “piwik_campaign=twitter” to your post’s url and then shorten it. This way, you can keep track better of the visits that come to your site following your tweets.
This plugin builds on Alex King’s Twitter-Tools plugin (https://wordpress.org/extend/plugins/twitter-tools/) and does not work without it.

Twitter Tools – Piwik Campaign Tagger

This plugin adds a "piwik_campaign=twitter" to the URL that is published by Twitter-Tools and then shortens it using bit.ly.

Simple Matomo Tracking Code vs Twitter Tools – Piwik Campaign Tagger