I knew a young woman who was raped by a stranger in broad daylight. I never forgot her.
My dd school has done a good job teaching about consent, online and physical safety and I have talked to DD about some of the most shocking cases like Sarah Everard - that you always have to be on your guard even if a person seems trustworthy or intimidating.
I always remember my best friend age 19 telling me that on the way home from the pub she got flagged down by police on a country road home. My friend didn’t drink but I guess the police could have seen her turn out of the pub and she did look about 15 years old! The police insisted she had to get out of the car, and my brave friend, who was utterly terrified, point blank refused to get out, handed her licence through the crack in the window and said she’d follow the police to the station but it wasn’t safe to get out of a car as a single female on an empty country lane. Amazingly the police let her go.
My dd has been doing martial arts since she was 8 - actually what it has taught her is that in a fight she hasn’t got much chance of overpowering a boy her age or older, but she does have self-defence skills. She knows that the main thing is to avoid the situation where the confrontation happens but failing that she might be able to fight back enough to escape or on a good day disarm someone with a knife, or look like she knows what she’s doing enough to get an attacker to back off. The main thing is she knows that she has to make noise and get away, that it’s better to shout “fire!” than simply scream as people ignore screaming.
Tracking someone’s phone gives false confidence - if they are being raped in a bush, by the time you get there, it’s too late. If your dd is walking alone a rape alarm is a good idea. Hold it to the attacker’s ear, the loud noise can be disorienting and create a small window of opportunity to escape. I actually used to have mine in my hand when I walked alone, if I felt scared I also used to put my front door key between my fingers/knuckles (can jab with it like a knife).
Obviously knowing about not accepting drinks in glasses unless you were at the bar is important but also, knowing symptoms and what to do if you suspect you might have been injected with rohypnol, as needle spiking is now “a thing”.
Knowing what to do if someone appears to be following you and worse if you are followed to your car (I miss the old days, when there was no central unlocking of every bloody door and a risk of someone climbing in to your car).
You can’t go at these topics all in one go though - it’s drip-feeding the advice over time and discussing news headlines and having that basic knowledge on place so when they go out you can just top up!