google engineering also said in his vides that there is no sandbox effect, it is just a rumor according to my when new sites are on their honeymoon period google give them perferences but right after the end of honeymoon period their rank goes down and the webmasters thought that its sandbox effected...
Many people believe Sandbox exists while thousands of webmasters disagree with the notion, totally rejecting the idea. But there is one reality and that is newly set up websites will need to gain trust of Google in the course of time and slowly before getting rewarded with top ranks. You may call the ranking waiting times whatever you like but it is useful to know how sites gradually make progress online and the way they reach top positions. In competitive niches, when a lot of top sites are competing with each other, naturally newcomers will need to wait for some time, like weeks and months before gradually they experience improvements in ranks. Links and contents have proved to be very helpful indeed and it is highly advised to be patient for some time. Great websites have not become popular overnight and so the new sites too need constant and gradual optimization.
If sandbox means for a new site to be indexed only after a few weeks, in this case yes sandbox exists.
Its the good old human rumour machine in action, I heard that every ship that has disappeared into the bermuda triangle can be found in google sandbox, yes of course
There is no sandbox whatsoever! Google just does not rank your website for the keywords that you went after! But you might rank for KW that you were not expecting! So this is not sandbox when you still rank! It is merely a penalization which is temporary!
Well Google penalize your site temporarily and you see your rankings going lower which is called as google dance but it is temporary only.Once you do quality backlinks then you may come well so good Luck.