allied

A Twitter account would be great to announce stuff for your business. Like, "Today, we are having a sale on tuna." But if you wanted one as a doctor or lawyer, I would advise against it. I would say the same about Facebook. It is good to get news out about your business and advertise.

LinkedIn, I think, is way better way to network professionally, as all your connections are of the professional variety.

I'm sure all of those sites are great. I'm reluctant to get involved because I spend too much time online already, especially on FetLife. I'm constantly trying to connect with people and explore potential relationships.