This read-only CiscoMilliSeconds object indicates total Round Trip Time for all connections going through the HTTP AO since it was started, with discontinuities possible at re-initialization, indicated by cwoAoStatsLastResetTime for the HTTP AO. An admin uses this as an aggregate latency measure across all HTTP-optimized traffic, useful for spotting broad degradation trends in web application responsiveness over the WAN. A rising cumulative RTT beyond what traffic growth alone would explain would point to worsening path latency rather than an HTTP AO issue.