I've only noticed that I write "So..." at the beginning of some sentences, when writing a first draft. I delete it, of course, but I suspect it serves a purpose

I've only noticed that I write "So..." at the beginning of some sentences, when writing a first draft. I delete it, of course, but I suspect it serves a purpose when speaking: When you're speaking, you need a quick way to divert others' attention to you. When you're writing, you already have their attention.