S.A.F.E. stands for Security Appraisal Framework and Enablement, do not read too much into that, it is a backronym. S.A.F.E. standardizes security reviews for datacenter products to reduce duplicate effort and set a reasonable bar.
The Framework page describes the objectives in more detail and explains how to engage with the program.
The Review Areas page describes the areas that are to be reviewed as part of a S.A.F.E review.
The SRP Approval & Dismissal page shows how to become an approved S.A.F.E. review provider.
The Security Review Providers page shows the currently approved security review providers.
The Reports folder shows the S.A.F.E. reports that have been submitted so far.