Pop Up Ad provides a very cheap and 'cost effective' means to reach a wide audience. It costs the advertiser a pittance and invariably gets the eyeball count.

Recommended Features of a Pop Up Ad Filter Software
There are many types of Pop Up Filter software that have flooded the market (probably as many as the Pop Ups). The key features that a good filter should have are:

• Block 100 % Pop Ups.
• Allow Pop Ups of sites in White List.
• Hot key to allow Pop Ups to be displayed temporarily.
  
• Test Pop Up Filter on-line. This feature allows you connect to a website with a Pop Up. If the Pop Up Filter you have installed is good, Pop Up Ad on the test page is blocked and you can see details in the log.
• Should not hinder or slow your web surfing.
• Consume minimal CPU resources.
• Should not block legitimate Pop Ups. For e.g. In the CNN web page, news snippets are displayed when you click a button. The snippets are Pop Up windows.
  

Following figure shows a screen shot of eScan email and Web Filter, the top selling Content Security software that has Pop Up Filter included in it.

Click on the image for bigger view