This is the 17654th most frequent Russian word.
уведомлениями
"Notifications."
In this sentence, "уведомлениями" is instrumental plural form, indicating interaction with notifications in a general manner.
Я настроил приложение для работы с уведомлениями.
I configured the app to work with notifications.
Here, "уведомлениями" represents the subject of satisfaction, showing that these notifications are what the user is content with.
Пользователь был доволен полученными уведомлениями.
The user was satisfied with the notifications received.
In this context, "уведомлениями" implies the object of review, instructing the interlocutor to consider these notifications thoroughly.