That means it doesn't need the consensus of entire bitcoin network to make it work. (bitcoinprice.com)
BIP 148 will help entire bitcoin network to get ready for segwit together on November 15th, the day when segwit is implemented. (bitcoinprice.com)
Ghash.io was launched in July 2013 and last year gained some notoriety through its success: In June 2014, it briefly gained control of 51 % of the entire bitcoin network. (businessinsider.com)