Gait is walking stance/personality of walking. So if someone walks with a limp, favors one side, slumps a shoulder, etc. Everyone’s is different, so it can be tracked.
This is very extreme surveillance avoidance, though anyone ditching their phone to go to a protest should also think about their gait and where they are coming to and going from. If you’re at this point of fear, you’d want a change of clothes in a bag, and maybe even different shoes. In like, 98% of U.S. situations though this doesn’t apply to us or our protests, it is just good to know. The night I’m talking about though and one other, it was honestly necessary.
Other than extreme circumstances though, these are tactics that only people who have legitimate reason to be paranoid. Such as Boeing whistleblowers, or journalists.