AdSense is an advertising network that has brought to website and blog owners an opportunity to make some money by showing text or a video on their websites. One great way to make money online is by adding AdSense to a WordPress site.
How to Add AdSense Ads to a WordPress Site Using Widgets
Login to your WordPress dashboard.
In new tab of your browser, Login to your AdSense account.
Click My Ads.
Click New ad unit.
Design your ad in the dialog box that appears.
Click Save and get code.
Copy the code for the ad in the dialog box that appears.
Come back to the WordPress dashboard.
Hover over Appearance.
Click Widgets in the drop-down.
Select the Text widget.
Add a title to the widget.
Paste AdSense code in the text area of your Text widget.