Where can we use Lightning Components

This is very common question I have come across. These are several ways we can use a Lightning component. I will be adding an example for each of them.

1. In a Lightning app.
2. Inside another Component.
3. In a Custom Action.
4. In a Tab using Lightning Component tab.
5. In Lightning App builder.
6. In a record Home Page.
7. Embed in a VF page.