I would say firstly education is a must. Educate your daughters (and your sons), please tell them the warning signs, let them know that if they’re seeing people being hurt or held against their will or they’re being made to do things to people, to please tell the family, tell anyone they’re trust because they’re not going to get into trouble. Don’t just teach them the whole stranger danger narrative or the men in white vans wanting to snatch them outside school because a lot of them are actually people they’re close to, their friends, their family, family friends, teachers at school and friends they’ve made online, a lot of exploitation happens online, perpetrators blur the boundaries between themselves and the victims so nothing ever feels “wrong” until it’s too late and even then you’re so glued to your abuser that they’re everything you think you need so you don’t listen to anyone who is advising you not to go off with then.
A lot of these girls have other vulnerabilities, they’re in care or they’re from broken families, those cases are so much more complex so it’s harder to comment on those. But with my own daughters, I would talk to them about what happened to me, actually teach them what a good relationship is, what a relationship is, how to recognise what a bad relationship is, and who can’t be in a relationship with them, I’d teach them consent and I would have to model a healthy relationship to my daughters, teach them boundaries, how to recognise if someone is pushing their boundaries, have an open book with them so that if they’re feeling like they’re lacking something that we can help to fix it because there’s horrible people in this world that will temporarily fill it and then betray you in the worst way possible. I’m from a household where this was never spoken about, I’m not expected to date just to marry.