Good morning meme: The viral “Hi Hi Good Morning” boy. According to Know Your Meme, this meme stems from a video of a delightfully cheery toddler warmly greeting people on his walk. First ...

Twitter users know this, which is why the "I don't know who needs to hear this" meme is still going strong even though it's been used on the platform since as early as 2013.

Memes are a cultural shorthand that, like all forms of communication, evolve with those who use them. Nobody can claim to know or understand every single meme that exists.