Did you know Google’s Search Engine Robot is pretty old?
Why do you suppose Google and other search engines, hardly ever update their search engine robots or come introduce newer robots with new functionality?
The reason is simple. The older robots do the job just as well as they always have and that’s because the robot’s job never changes. The robot basically exists to simply capture content and links and return it to the search engine.
A Beginners Guide to the Google Link Algorithm Part.1
EVERY search engines primary goal is to provide the best quality, most relevant search results possible and the way each search engine does this varies considerably.
Google’s Indexing Process - Everflux
You have noticed that your NEW website was in Google yesterday & ranking well & today it’s gone! What happened? There is a very easy explanation for the above phenomena & it’s been referred to as “Everflux”.