On Higgs Hunters volunteers can view and evaluate particle decay patterns in order to help identify so called "off-centre vertices" that have been missed by the ATLAS algorithms. Off-centre vertices show that an uncharged particle has decayed into charged particles which could be a sign of an exotic Higgs decay.
In 2015 LHC is put into operation at higher energies and with more intense beams. Then researches want to pay off-centre vertices particular attention.