There are many different Google data centers. Each
of these may respond with different results for the same search
query. If you see results that vary from data center to data
center, it means that Google is in the middle of updating its
search index. This information can be helpful for SEOs who want
to observe various individual active servers for search engine
optimization purposes.
This tool also features
an optional language/country selection option, which allows
you to receive more specific results for your criteria.
