新站排名不稳定的Google幽灵现象

... And ...

2.) The "Fresh Crawl"

A new Webpage is first crawled by the "Fresh Crawl" spider. (The exception to this would be the time period soon after Googles monthly update, as it could then be first crawled by the "Main Crawl" spider. Monthly updates usually start around the 20th - 28th day of the month and can last for several days.)

To distinguish the difference between the two spiders look at the range of their IP addresses.

1.) The "Main Crawl" Spider = 216.239.46.*

... And ...

2.) The "Fresh Crawl" Spider = 64.68.82.*

To explain what happens with a new Webpage, well assume that it is first crawled by the "Fresh Crawl" spider.

At some point in-between Googles monthly updates the "Fresh Crawl" spider crawls the new Webpage. (The new Webpage may have been initially found by a link during the "Main Crawl" or the link to the new Webpage may have been found by the "Fresh Crawl" but either way, it "reads" the new page with the "Fresh Crawl" spider.)

Quickly, the new page is evaluated, and is included in the search results, even though it hasnt been involved in an update and isnt included in Googles "Main Index." These rankings are then very vulnerable and unstable and change very frequently.

Next, the regularly scheduled monthly update occurs, which is also known as "The Google Dance" and this page does take part at some stage of the dance, but remember that it has not yet been "read" by the "Main Crawl" spider, so it does not end up in the "Main Index" yet.

When the monthly update is over, the new Webpage will still be considered a "Fresh" page.

Soon the "Main Crawl" spider will "read" this new Webpage, but it will have to wait for the next monthly update before it will take its place in Googles "Main Index."

Until then, Google wont display its Backward Links (inbound links), and its rankings will remain very vulnerable and unstable and apt to change quite often.

Now to put all of this into perspective.

If a new Webpage is first crawled by the "Fresh Crawl" spider and immediately AFTER the "Main Crawl" spider, it will go through two monthly updates and have to wait almost two months before its included in the "Main Index" and for its rankings to become stable and accurately positioned.

During this time period the new Webpage may come and go in the Google SERP (Search Engine Results Pages). Erratic behavior is the norm for such pages.

On the other hand, if a new Webpage is first crawled by the "Main Crawl" spider (usually the latter part of the month) it will only have to wait about a month to eventually get into the "Main Index."

When Web designers and site owners are not aware of how Google actually processes their NEW Webpages, they can become very confused about what is actually happening when they see their pages appear and disappear or rank high one minute and then not be found in the top 100, the next.

Happy SEOing And Well See You At The Top!

Your Friends,

Sharon & Roy