Cloaking comes down to two main terms – core domain and Shadow Domains™. Your core domain is your website, which is what visitors see. Search engines see something different. This is where the Shadow Domains™ comes in to play. These domains are basically a topical shadow mirror of your core domain using highly optimized Phantom Pages. It is just optimized to give search engine spiders what they want to see.
Phantom pages are web pages offering highly optimized content intended for search engine spiders only. Shadow Domains™ are dedicated web properties focused on offering optimized content to search engines while redirecting human visitors to another site, typically a company’s Core or main domain.
So, technically speaking, Shadow Domains™ are web sites consisting entirely of cloaked Phantom pages not intended for human perusal.
As these pages aren’t intended for human consumption anyway, the actual text used needn’t really make “sense” in any grammatical meaning of the word as long as its semantic content is fairly relevant to your pages’ focus.
You may wonder how cloaking can distinguish between human visitors and search engine spiders. The answer is simple. A specialized algorithm is used which immediately recognizes one from the other. When a spider comes crawling, it is unaffected and continues to the shadow domain. Visitors are routed to your main site or core domain.