I have found that many sites I want to advertise on utilize iframes. However, many of the landing pages that I want to direct people to utilize iframe blocking code and so the site shows up as a blank page on the advertising site. You basically will have wasted your advertising money.

The free iframe checker V3.0 from TinyWebGallery.com is a great resource to bookmark and utilize when planning your advertising.

You can put the URL you are hoping to direct people to in the form on the page and click the 1. Check Headers button. If it comes up green then likely the site will show up in the iframe.

Checking:

Result

The page does exist and no X-Frame-Options header was found.
But there can still be a iframe blocker script on this page. Please see below.

You can then click the second button 2. Check frame killer script and if the site appears in the iframe then everything should be good to go.