I've been interested in learning about the process of beta reading, and one thing I haven't seen touched on a lot is the means of communication for talking to betas.

Do you use a rich text editor like Word or Google Docs, adding them as an editor? Or do you simply post the work as you normally would, and communicate with your beta in the comments? Or do you post the work without tags or any way for outsiders to easily access it, and let them comment on it that way?

Or is there some other method you use, or you've heard of others using?