Sentence:  Mastodon users can send <WSD>toots</WSD> with 500 characters as opposed to Twitter's 140. But that's not the only difference. Individual <WSD>toots</WSD> can be marked as private, meaning you don't have to choose between a public or a private account like on Twitter. 
Meaning of the word marked with <WSD> tags:  A message on the social networking software Mastodon.