akuperma and lilmod ulelamaid, thanks for your help.
I will give some example, I got a shidduch suggestion of a girl who consider herself yeshivish, she studied at a seminary in Israel for one or two years (can’t remember exactly), she dress modestly but uses facebook, she says it’s only to use with her friends(girls).
I personally don’t like FB, but maybe it’s more okay in America and I shouldn’t be worried?