Unbelivable result in google search

Hello all DP member today i found strange result in gooogle when i search in gooogle for wikipedia then i found result with box means square samll box like this Click here so please can you tell me what is this why box come in this result also i found this type of listing many times so please tell me. i found search buttion for wiki so pease how we can get and what is benefits it.

 

It's a search box alot of big sites got them like youtube http://www.google.com/search?sourceid=chrome&ie=UTF-8&q=youtube

 

It's basically just a search box which allows you to seach for content within Wikipedia without actually opening the Wikipedia page.

 

it is because Wikipedia is considered as a high quality website by Google.

 

I think this is an automatic feature from Google for a big site that's valuable or very useful for users.

" We only show sitelinks for results when we think they'll be useful to the user. If the structure of your site doesn't allow our algorithms to find good sitelinks, or we don't think that the sitelinks for your site are relevant for the user's query, we won't show them.

At the moment, sitelinks are completely automated. We're always working to improve our sitelinks algorithms, and we may incorporate webmaster input in the future."

ref:
http://www.google.com/support/webmasters/bin/answer.py?hl=en&answer=47334

 

Thanks dear all but what kind of benefitsa and which point google consider foe give search box

 

Google's "search within a search" is actually officially called "teleporting" and it's been around for a few years. The logic behind it is that apparently there are a lot of searches for brand names when people forget the domain so Google come up with the result and the option to search within the domain.

Youtube is best exemplified by the actual search for "youtube" - http://www.google.com/search?hl=en&source=hp&q=youtube&aq=f&aqi=g10&aql=&oq=&gs_rfai=

The original announcement is here - http://googleblog.blogspot.com/2008/03/search-within-site-tale-of.html

You need to be considered to be as authoritive as Youtube, Nasa or Wikipedia.

 

This not new. Google show it for many site.
Like one more example of W3School.com
http://www.google.co.in/search?q=w3...&aq=t&client=firefox-a&rlz=1R1GGLL_en___IN373

 

here is a website which is a software to download no such important content to search within http://www.google.com/search?hl=en&safe=active&q=daemon+tools&aq=0&aqi=g10&aql=&oq=daemon&gs_rfai=

thats weird