What does that question mean? I mean, define “Online” first. Because if you mean electronically? Or do you mean over the Internet? And then, what do you mean by “What ways?” You mean like, hostile? Polite? Roundabout? Direct? And another question I have is, are you asking when it is appropriate to communicate online?
Generally, I try to communicate directly but politely both by text and by email, but sometimes I get really obnoxious. That covers two ways. Then there’s this blog, which is at this time includes third person and first-person narrative and the informative voice. Finally, I would say that in the U.S. most people are always at liberty to communicate online, though it requires money, and there are certain times when it is not advisable. Like when you are in a class at an institution of learning, or when you are eating and drinking and run the risk of spilling on your devices. I could go on and on, but I tire….

I like to communicate on the phone and have a conversation. Sometimes written communication leaves way to many avenues for misunderstanding that can be easier addressed when having a voice conversation. However, I understand that some like to use the written word so I will do both.
Mary E