You don't need a degree in audio engineering to use it. Simply load it onto an audio track and adjust the central slider until the noise disappears.
For modern macOS (Ventura/Sonoma/Sequoia) users, Waves recommends migrating to NS1 (part of Waves V14, native Apple Silicon, compatible with macOS 10.15–14). waves ns1 noise suppressor v9135 mac osxxdb