What does 07 mean?

o7, an emoticon for a person saluting. O-7, a pay grade in the US uniformed services: Brigadier General in the Army, Marine Corps, Air Force, and Space Force. Rear admiral (lower half) in the Navy, Coast Guard, Public Health Service Commissioned Corps, and NOAA Commissioned Officer Corps.

What does O7 mean gaming?

The o7 emote indicates a salute, with the o representing a head and the 7 symbolizing the outstretched arm. This emote often sits as a sign of respect on Twitch.