The internet is full of bullshit advice (ESPECIALLY around sex and health issues). Doctors and therapists cost money, and frankly aren't the best way to just get basic facts and education.

My small local library has kiosks near the exits where you can check out a book completely unassisted. I could walk in, pick out the most embarrassing book, check it out, and nobody would ever have to know.

Thanks to a sign like this, someone who didn't know the library had such resources, and/or was too embarrassed to ask, has a better chance of accessing that info. And they also know that the library staff WANTS them to be able to access that info, further reducing any stigma they might feel.