Stereotyped does two jobs, and they are close but not identical. As the past form of the verb stereotype, it means someone decided that a whole group of people are all the same, and judged an individual by that fixed picture instead of by who they actually are: 'She felt stereotyped as the quiet Asian girl in the class.' Used this way it is almost always about unfairness, and it is usually passive — people say they were stereotyped, less often that someone stereotyped them, because the person doing it rarely admits it. The second job is as an adjective in front of a noun, meaning tired, fixed, seen-a-thousand-times: 'a stereotyped view of old people', 'stereotyped roles for women in old films'. Here it is a criticism too, but a milder one — you are saying the picture is worn out and lazy, not necessarily that it wounds someone. Register: this is discussion English, the language of classrooms, essays, news, and workplace training, not chat between friends. One more layer worth knowing: in medicine and animal science, 'stereotyped behaviour' means a movement repeated over and over in exactly the same way, with no unfairness meant at all — a caged bear swaying, a bird pacing. That is a specialist use, but it shows the word's real root idea, which is 'fixed, unchanging, printed from the same plate every time'.