The　review　system　is　a　core　component　of　the　online　market　as　it　provides　user-generated　content　to　support　consumer　purchase　decisions.　We　investigate　the　welfare-based　effects　of　review　information　features,　i.e.,　the　amounts　of　quality　information　and　match　information,　and　the　accuracy　of　quality　information,　on　the　sellers　and　consumers,　and　discuss　their　implications　for　the　online　selling　platform　owner.　We　find　that　the　amount　of　review　information　positively　influences　social　welfare,　but　quality　information　and　match　information　play　different　roles　in　the　process　of　welfare　enhancement.　Quality　information　reduces　the　sellers＇　profits　but　significantly　increases　consumer　welfare,　while　match　information　benefits　the　sellers　more　than　it　hurts　the　consumers.　The　inaccuracy　of　quality　information　negatively　affects　the　welfare　enhancement　function　of　review　information.　Considering　the　sellers＇　quality　information　manipulation,　we　derive　the　conditions　of　inaccuracy　information　controlling　and　find　that　a　higher　manipulation　cost　coefficient　eases　the　prisoner＇s　dilemma　for　the　sellers　and　increases　consumer　welfare.　We　discuss　the　implications　and　also　note　some　counterintuitive　insights　for　review　system　management.