To track your website, i.e. the number of user visiting your site, You can put Google Analytics code into your wordpress header file.
Sign up for the free account, After that it will lead you the page where you will see the Tracking code.
Copy the tracking code and open your website by visiting
Appearance->Editor and select the header.php
Find out </head> and insert the code before that. Click on Update file.
Visit your Analytics page and click on Reporting Tab on top
There you can see the Real-Time menu, Click on it, Now open your website, you will see it will show in real time access. Once your website is visited often by people you will be able track actions and pages and sources by the visitors.
Have a good day.