Studentaffairs.psu.edu is the official online home of Penn State's Student Affairs division. If you're asking whether it's safe or a scam, the short answer is: this is a legitimate .edu domain that's been operated by the university for close to 20 years. That alone sets it apart from fly-by-night sites.
For an educational institution, transparency and a long track record are the most important trust signals. This site has both—an about page, clear contact info, social media profiles, and a privacy policy and terms of service. Its security setup (valid TLS certificate, no blacklist history) is exactly what you'd expect from a major university's web presence.
Because this is a university site, there's no commercial transaction or payment to worry about—it's primarily informational. The domain resolves to Penn State's own network, and the web archive shows consistent content since 2007. In short, studentaffairs.psu.edu is absolutely safe to use for any Penn State student looking for campus resources.