Basically something to say if you are a sad boi or, if you see something that is downright adorable.
Person one: Woa there be a kitten over there matey.
Person two: awwwwwwwwwwwwwwwwwwwwwwwwwwwww
bhibhcvtycdtyghnjkiyu7ighuyfvrdghnuijmikookijunhujbgyvftxczdfghyvvvvbuvrtxbgfrdrtuiuobuydzwrdtftfgftft. Such amesmerizingsentiment! awwwwwwwwwwwwwwwwwwwwwwwwwwwww
When you have a crush on someone and you think they're the most spicee person but you can't tell them so you spam your friend with Awwwwww or eeeeee because you are constantly thinking about them.
Shoes that a person deems to be gorgeous, resulting in an exclamation of "ooooh" at the sight of them. Examination of the price tag results in the person exclaiming "awwwww" and walking away, realising that they can't afford them, not now, not ever.