SEO command
SEO Spammers exploited google a lot using that command, They check the backlinks of important sites and figure our who links to them and use those data to improve their own sites, Especially Link mongers used those commands as a part of their business and they sold links based on the number of links showing on the backlinks in google after buying their services, This must have made google frustrated and they purposely broke that command so that it wont serve as a tool for spammers. SEOs that is working with spam methods will cause the lower search engine company web site ranking
Hosting
To optaing best result your web site should be located under best servers. Server technology so effects the website loading and working time. The servers that you located must have latest versions of processors and hardware.
GOOGLE Link checking strategies
Finally, Last but not the least let us deal some strategies on link checking with google, Google as we all know is by far the best search engine out there, Still they dominate the search market and majority of the search users are google users. Google link check features is for the indicate search engine company web site ranking
Most of the users prefer google to find information, they switch search engine only if they don’t find what they want in google,
Google’s crawler is the most active crawler out there in indexing sites, They run around indexing sites all the time, So they have the most up to date information of pages which are updated recently, So it simply means they know most of the links pointing to our sites,