Now, switch tabs and go into your Dashboard of your WordPress site.

Select Appearance.

Next, select Widgets.

You will then select a Text widget. It looks like this:

You will then drag it over to your Primary box and drop it where ever you want it to your appear on your sidebar of your website.

Next, open up the Text box by clicking on it and Paste the Javascript code into the text box as shown here:

Next, click the Save button on the lower right hand corner of the screen as shown above. After you have saved it, click on Close.