Twitter isn't some fly-by-night company that has to hard-sell what it is. It's a well-known product that has independent mentions in media left, right, and centre. News shows, current affairs shows, morning TV, newspaper websites... all of these mention twitter constantly, as they use it as a lazy source of react quotes. Even talking-head panel shows have runners at the bottom of the screen showing what's happening with twitter. Twitter doesn't have a problem with people understanding what it's about.
I can know exactly what twitter is and still not want an account. I can get what I want out of twitter, and twitter can get access to my eyeballs by just showing me things when I want to see them.
Don't get me wrong. I loathe twitter, and I don't have an account. My point is that twitter doesn't need to do the hard sell on what it is anymore - as far as the public is concerned, it's almost a utility like power or water. It's everywhere, through everything, and it's "just assumed" that you use it, whether you actually do or not.
My point is that if people are online and looking at the twitter homepage, they know what twitter is already. The exceptions to the rule would be a vanishingly thin slice of netizens.
I can't count the number of times I clicked a link to read a news story (even on news outlets like Al Jazeera) and the "article" was basically "Here's what twitter users had to say" followed by a dozen or so tweet cards
