Google Search Box for Bookmark sites

How to get Google search box under Google organic search

[Raheel]

I was looking for a search term "Bebo" at Google and its shows Bebo.com at the tops and there relevant search links but another other was there which is the search box for the Bebo.com I don't know how they did that or Google doing for Bebo.com my question how I can do that or acquire that search box option for my web site.

[bill]

That was first noticed here back in March: New Search Box Under Sitelinks [webmasterworld.com]

This feature will now occur when we detect a high probability that a user wants more refined search results within a specific site. Like the rest of our snippets, the sites that display the site search box are chosen algorithmically based on metrics that measure how useful the search box is to users.