different between shoutbox vs tagboard

English

shout +? box

shoutbox (plural shoutboxes)

(Internet) A tagboard.
- 2007, Nancy K. Baym, The new shape of online community: The example of Swedish independent music fandom
  They avail themselves of multiple communicative platforms across the Internet: blogs, social networks, comments, discussion forums, private messages, shoutboxes, MP3 files, and videos.
- 2010, Erika Blanchard, Appity Slap: A Small Business Guide to Web Apps, Tech Tools and Cloud Computing
  Embed a shoutbox in your blog/website for your visitors to interact among themselves.

tag +? board

tagboard (plural tagboards)

(Internet) A small message board on a webpage, usually located in the sidebar, where visitors can leave a name and short message.

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