Sending the message usually requires a bot to send the articles from one user to another so you need to acquire one
. You can also acquire for a single or group user. Usually, most companies apply social media through one computer user who would send a message to countless users. However, since you need to hire a person to do it this is actually more expensive than a bot. The only difference is that the user can actually answer all the questions imposed by the surfers while the bot would answer according to his programming.