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Now, there are two other terms related to Google‘s way of ranking pages: Hilltop and Sandbox.

Hilltop is an algorithm that was created in 1999. Basically, it looks at the relationship between “Expert” and “Authority” pages. An “Expert” is a page that links to lots of other relevant documents. An “Authority” is a page that has links pointing to it from the “Expert” pages.

In theory, Google would find “Expert” pages and then the pages that they link to would rank well. Pages on sites like Yahoo, DMOZ, college sites and library sites would be considered experts.

Sandbox refers to Google’s algorithm which detects how old your page is and how long ago it has been updated. Usually pages with stale content tend to gradually slip down the result list, while new pages just crawled initially have higher positions than they would if based on PageRank only. However, some time after gaining boosted positions, new website disappear from the top places in search results, since Google wants to verify whether your website is really continued and was not created with the sole purpose to benefit from artificially high rankings over the short term. The period when a website is unable to make it to the top of search results is referred to as “being in the sandbox”. This can last from 6 months to one year, then the positions usually restore gradually. However, not all brand new site owners observe the sandbox effect on their own sites, which has led to discussions on whether the sandbox filter really exists.

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