"Factory Method Design Pattern" in context of Java interfaces?

I am a beginner in Java and the book that I use to learn it seems to have cryptic examples and sentences that completely confuse me.

I understand what interfaces are and how/where to apply the concept in real world. But what are Factory Methods? The term "factory method" is ambiguous (JavaScript has a different meaning for that) so I am providing the snippet that the book has, in order to make my question clear. Here is the code:

interface Service {
    void method1();
    void method2();
}

interface ServiceFactory {
    Service getService();
}

The Service interface is just a normal interface. ServiceFactory interface looks like a normal interface but it is a "Factory Method". What's that? What does it solve and why I should use them?