If aliens came to Earth at this point in the 21st century, we would need to show them memes.
It is an indisputable fact at this point that they are woven into the cultural fabric in a way that is not going to become unspun again. They are so effective in communicating everything from a slice of life to abstract concepts that they can prove to be a great learning tool, as well as an insight into human nature as it stands. On top of that, they give us the chance to laugh at things both ridiculous and somber. You can’t say that they don’t have range.
As a result, they are in many ways the perfect method to acclimatize someone (or something) to how the world works today, after you have covered the basics. Memes are the hopes, thoughts, and feelings of people distilled, and they prove the important point that a lot of us are very silly. There may be more to how this world works, but that is a fundamental part of it. This is why memes are a good representative for us, and why they have succeeded in being so popular over so many years.
Still, you do not have to worry about all of that, seeing as you are only here to scroll through whatever is below and go. With no extraterrestrial invasion in sight, you are free to enjoy these memes in the humble, distracting way it was originally envisioned that you would enjoy them. They are a perfect bite of lowbrow entertainment.