Landing pages are webpages used in advertisements especially Google Adwords. Good landing pages should be minimal versions of your website with a webform conversion as the call to action. For example, we use a very basic landing page on a custom web domain (like a ‘sister site’) to optimise for the key phrases ‘online marketing’ and ‘marketing education’.
Check out our landing page at Education Marketing Online to see where some of our advertising leads go to. The design is completely minimal and because it is a custom web domain you can target a very narrow set of keywords done well.
The key to landing pages is to monitor what works using Google Adwords conversion code. Such a code tracks when a form is filled out successfully and then you can tweak your ads and your landing pages to maxmise the number of conversions.