What does rebooting my iPhone mean?

pegah
25.06.2017

Ducky
25.06.2017

Turning it off and back on again

What does this mean: Free Msg: Receiver unable to receive message - Message Blocking is active mean on iPhone's iMessage? I tried sending my friend a text and it replied with this. We haven't gotten into any fights and we hung out for hours recently. Has she blocked me?
What does rebooting an iphone do? I was on an app on my iphone 5 when a message came up telling me to reboot it because of memory usage (or something along those lines). I rebooted it (hold the power and home buttons down) and it restarted as normal. But why did it ask me to reboot?
My iphone's music is broke after rebooting it Help! My Iphone is possessed! I have an iphone 4, and I realized "other" was taking too much space on it. I deleted the music from my usage section of settings, and rebooted my phone. Like I hoped, I freed nearly a GB of other, and i went to see if my music still remained on my phone and it did. But now, my music scrolls through itself without me touching it and it says its playing, but then it switches to not playing and back again! How do I stop it?
My iphone rebooting over and over? My iphne has been reboting itself. Its on for a few minutes but it just boots it self again. I tried every method but non of them work. I need the method for iphone 3g ios 6