Good question I like the convenience of scheduling tweets, especially when timing is important for sharing certain information. But it does not replace real time tweeting, it's only a component of managing Twitter. Scheduled tweeting does not allow for interaction unless you are constantly monitoring, and in that case you may was well be Twittering in real time. - Juliann

I using scheduling to space tweets out so they don't bunch up in a followers stream. I like to send tweets out daily and find I need to schedule some during my downtime. I take time and share, what I hope, is valuable content from ppl I follow along with content I discover from other sources. Real time allows me to have conversations with people around interesting topics in real time. - mi6 agency