Domain name:

This is the name that identifies a website address. The name is written without any spaces or special characters, just numbers and letters and ends with a “.com” or “.net” or one of many other 3-letter, 2-letter (like “.tv” or 4-letter (like “.info”) designations that describe what type of site it is. Government sites end in “.gov” and educational sites end in “.edu.” While .org is supposed to be only for nonprofits, often this type of address is purchased by those without that designation just to reserve the name.

Doorway page:

A page specifically designed for search engines to draw traffic and then unethically redirect this traffic to another web site or page. These pages may also be used for cloaking.