Learn French: On est ici.

In everyday French, on is the most common way to say "we". But grammatically, it acts exactly like il (he) or elle (she). That is why it pairs with the singular verb est. Think of it like saying "one is here" to mean "we are here".

Can I use nous instead of on?

Yes, you can say nous sommes ici to mean "we are here". However, using nous sounds much more formal. In everyday conversations, French speakers almost always prefer on est.

How do I pronounce on est together?

Because on normally has a silent n at the end, but est starts with a vowel, you link the sounds together. You pronounce the n to connect them, making it sound like "on-nest". This spoken link is called a liaison.

Does on always mean "we"?

Not always. It traditionally means "one" or people in general (like in the English phrase "one must practice"). However, in modern spoken French, it is most frequently used as a casual replacement for "we".