This is the 1102nd most frequent Polish word.
ogłoszeniu
"Ogłoszeniu" means "announcement" or "notice" in English (in the locative or dative case).
The word 'ogłoszeniu' is used to mean 'advertisement,' specifically in the locative case, indicating the place where something was found.
Widziałem informację w ogłoszeniu.
I saw the information in the advertisement.
Here, 'ogłoszeniu' refers to an 'announcement,' indicating an action that was officially made known, also in the locative case describing the timing of the event.
Po ogłoszeniu wyników, wszyscy byli zaskoczeni.
After the announcement of the results, everyone was surprised.
Once more, 'ogłoszeniu' is used in the locative case to specify a location, here implying a document containing details or information.