That's a big question! Ever is a common word used in different ways. Ever does NOT mean always. Used with forever maybe, like in "forever and ever" as an expression. Ever is often put on the end of different words like whatever. Used alone in "did you ever go to a restaurant?" was a good example. If you give us a sentence that you saw it used in we'll better be able to help you.

It means always.

"Ever" means , at any point time . For example ... "Have you ever been to that restaurant?" Meaning : at any point in time , have you been to that restaurant .