What does m mean in financial terms?

Okay, so, "m" in financial stuff? It means millions. I remember the first time I saw that – talk about confusing! I was looking at some report, all these numbers with "m" after them, and I'm like, "What is this? Some kind of secret code?" Seriously, right? It felt so exclusive, like I wasn't supposed to understand. Why not just write out the whole number? Like, $3,000,000 instead of $3m? Wouldn't that be easier for everyone? I mean, sure, it takes up more space, but still... less intimidating, you know? It's like they want to make finance seem complicated. Reminds me of that time I tried to decipher my friend's 401k statement... it was like reading another language. Anyway, "m" is just million. Nothing fancy, just a shortcut. But honestly, sometimes these shortcuts just make things more confusing, don't they?