What are Sensitivity Readers? Are they important?

Well, it depends
Are you writing about sensitive subjects such as Native Americans and you aren't Native American? Or in my case, I'm writing about child abuse, neglect, domestic violence, foster care, etc.
So yes, I want to have sensitivity readers to make sure my main character isn't playing the victim role but is also being true to what an abuse victim deals with.
Yes, I know not everyone deals with trauma the same way. But it's my job as the writer to make sure I do justice to those who've faced abuse or neglect.
Lucia Sugafield, hoping I get this right.