It usually means they want you to have the same views on what language to use, what platforms to use, what computers to use, whether or not you do "test driven

It usually means they want you to have the same views on what language to use, what platforms to use, what computers to use, whether or not you do "test driven development" and things like that. It can also mean they want you to be around the same age and have similar tastes in clothing, hobbies, political views and music.