It is used to indicate that something is or exists.
For example:
* "Deus est." - God is.
* "Flos est pulcher." - The flower is beautiful.
It can also be used in conjunction with other verbs to indicate a state of being.
For example:
* "Ego sum rex." - I am king. (literally, "I am the king.")
It's important to note that the meaning of "est" can vary depending on the context.