Hello there!
The site's automated messaging system selected 3 random newcomers (you being on of them) and then selected a random regular (me) to greet them.
I see you've already made some very nice submissions so far.
Keep up the good work!
Also, Llama badges are a thing.
They are a way to measure interactions and communication between people on this site.
Giving a Llama Badge to someone means that you at least made the effort to visit their profile in the first place.
It's also a way to gauge how active someone is.
I've only been on here for a few weeks and have 182 Llamas, and then there are those who've been here for years and have almost none.
Anyways, I think you're going to enjoy your time on this site!