This read-only Counter64, in sessions, indicates the total number of SharePoint Pre-fetch optimized HTTP sessions, incremented for every session eligible for SharePoint pre-fetch, where the edge WAAS device fetches data it anticipates the client will request soon. An admin uses this to see specifically how many sessions are benefiting from the more advanced pre-fetch behavior, as distinct from basic SharePoint optimization tracked by cwoAoHttpxStatsTotalSPSessions. A pre-fetch session count that's much lower than the total SharePoint session count would suggest most sessions aren't matching the pre-fetch eligibility criteria.