Add the counter code to the HTML code of all of the pages on the website where you want the signal to appear.

To do so, click "Site Pages" button on the left:

Choose the page, click menu icon and then "Edit":

Now you need to copy counter code. To do so, go to the "Install Code" page:

And click “Copy” button:

In the WordPress: choose "HTML" and add the counter code to the appeared field:

You must repeat this on every page of the website where you want the signal to appear.