Which social media do you use most? Facebook OR Instagram

Hi, very good morning guys. I use social media is very rare. even though I’m using Instagram rather than facebook. so why do I think I can keep the data safe there? no one can easily see my account without my permission.so i do not need  to keep track of my account. even though the apps are allocated from my mobile, I do not need to deactivate my account. it looks so safer to me.
now tell me what is your favorite social media? what is the reason for that?