Joined: Oct 2016
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What is the sandbox effect?
Joined: Aug 2016
Posts: 160
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According to Wikipedia.
"According to the theory of the sandbox effect, links which may normally be weighted by Google's ranking algorithm, not least improving the position of a webpage in Google's index, may be subjected to filtering to prevent their having a full impact. Some observations have suggested that two important factors for causing this filter to come into play are the active age of a domain, and the competitiveness of the keywords used in links."
You should have just googled it. Its easy that way.