This is the most common view, being the real-world angle that we are all used to. It shows subjects as we would expect to see them in real life. It is a fairly neutral shot.
This shows the subject from below, giving them the impression of being more powerful or dominant.
A high angle shows the subject from above, i.e. the camera is angled down towards the subject. This has the effect of diminishing the subject, making them appear less powerful, less significant or even submissive.
The scene is shown from directly above. This is a completely different and somewhat unnatural point of view which can be used for dramatic effect or for showing a different spatial perspective.
In drama it can be used to show the positions and motions of different characters and objects, enabling the viewer to see things the characters can't.
The bird's-eye view is also very useful in sports, documentaries, etc.