Documentation of WPStats
Its a simple Plugin which adds Code in the Head. It can used by Matomo or Analytics. Really simple!
The Documentation is Online now
First Step: Please install the Plugin in the Extension Manager.

Now you have to activate and configure the Plugin. So go activate and configure the Plugin on the left site called Matomo/Analytics

Click on Save.
Thats All. Really simple.
What are the Options in WordPress Matomo/Analytics Plugin?
Its as simple as possible and self declaring. But i will explain the Options.
First you have to add some Code, which you get from Matomo or Analytics.
Then you have the Option to remove Cookies from Matomo. That's automatic and works only with Matomo!