Social media companies almost never advertise. Seriously, when was the last time you saw an ad on television for Facebook? I guess the idea is that Facebook ads are Facebook ads. Doesn't make a whole lot of sense to me, but what do I know? Still there's an odd thing about how people actually find out about the platforms. Some say it's the slogans but we'll say it's just word of mouth for now.
Since companies like Facebook and Instagram don't have an ad campaign they have never needed to create a slogan for themselves. However, earlier this week users on another social media platform, Twitter, took it upon themselves to make ads for these companies and you know what? I now see why companies did not have their own slogan before.