So I've got a new Android phone like a week ago. But still couldn't get used to it. Still, couldn't figure out some part that how is it workes. Now, this is about notifications I get by installed apps. On the drop-down menu, I get it usually but some of these notifications are not removing even if I try to remove it. Most of them are saying that some kind of app running. And it won't dismissive.
Does anyone have any idea how to remove these non-removable notifications?