One of the easiest ways to monetize a website is with advertising at least in theory. Most blogs that we know including our own use display advertisement, banner ads, to generate a good portion of the site’s income. However, to earn a handsome amount from displaying ads, you need to manage the ads properly. Great ad widgets will help you to place your banners perfectly and to increase your earnings.
We’ve gathered a list of the useful free banner advertising widget plugins for WordPress that will help you automate all those tasks, and more. Feel free to try them out and see which one works best for you. Following are some more related articles that you may like to browse through: Free HTML5 CSS3 Pricing Table Designs, Premium Masonry Themes for WordPress, Free Realistic Logo Mockups PSDS and Gun Logo Design Ideas.
1. Sidebar Image Banner Ads Widget
This Plugins helps to add image banners on the sidebar. Allows to enter title, description, image on the sidebar and is very easy to use. This plugin intended for simplest use of image banners or small ads in the sidebar or any widget area in the WordPress theme.

2. Advanced Advertising System
If you have customers who want to promote their products on your site, Advanced Advertising System can help you. The main of this plugin is to manage advertisers, to control campaign especially the pricing model for each advertiser. You can manage ads zone(position) and specify the pricing model(CPM, CPC, CPP) for each zone slot. Front-end display is based on priority system.

3. Floating Banner Ad Rotator with Tracking
Display a Floating Banner Advert Rotator Box at the Bottom of Your Site. Track Banner Views, Clicks and Clickthroughs or add Custom Banner Tracking HTML from External Services. Each time someone visits your site a banner advert will be chosen at random and be shown. Adverts will only be shown once per session to avoid being distracting.

4. Banner Upload
Easy way to display the different size of banner advertisements in WordPress using widgets. Upload the banner ads through widget. Specify the banner ads width and height size using px. Create multiple banner ads using widgets. Specific the link for that advertisement, so that when users click the banner, the link will be opened in new window.

5. WordPress Calls to Action
This plugin creates calls to action for your WordPress site. It gives site owners the ability to monitor and track conversion rates, run a/b or multivariate split tests on calls to action, and most importantly increase lead flow! The calls to action plugin was specifically designed with inbound marketing best practices in mind and will help you drive & convert more leads on your site.

6. OrbitCarrot CTA Widget Manager
CTA Widget Manager allows you to very easily create Call To Actions for your WordPress sites as widgets, simply choose the text, the style and where you want the CTA to link to. CTA Manager also allows you to create Call to Actions as widgets but has more functionality including creating in-content CTAs with an awesome CTA shortcode generator check our CTA Manager.

7. AdNgin-AdSense Revenue Optimization
AdNgin uses a unique algorithm to continuously A/B test AdSense ad units and improve AdSense revenues. The easy to use dashboard provides easy drag-and-drop capabilities so no coding necessary, just magic. The WordPress plugin offers simple installation and setup. Our dashboard was created using customer feedback to provide a seamless user experience.

8. Random Banner
Random Banner WordPress plugin provides users with high level of flexibility to show the banner ads randomly. Easy to add individual link for each banner, so that when user click the link will be open. Admin can able to upload 10 banners or banner links. Banners will be displayed randomly based on the number of banners uploaded in setting page. Custom title can be added for that banner in widget location.

9. Perfect Audience Retargeting
Perfect Audience lets you create Facebook and web retargeting campaigns in minutes that bring back lost customers and get you more sales and conversions. This plugin integrates your Perfect Audience code across your WordPress site so you can get started without editing code.

10. Ads by datafeedr.com
The Ads plugin allows you to add advertisements to your blog. You can add advertisements to your posts, pages or Text Widgets via the shortcode. You can also add ads to your site by adding a function to your theme’s template files. You have full control over how many ads get displayed as well as their sort order.
