It is a behavioral design pattern. We can use it to create an outline

for an algorithm or a complex operation. We first create the skeleton

of a program. Then we delegate the steps of the operation to

subclasses. The subclasses can redefine the inner implementation of

each step.

E.g. While designing a Game in Java, we can implement it as an

algorithm with Template Method pattern. Each step in the game can

be deferred to subclasses responsible for handling that step.

Let say we implement Monopoly game in Java. We can create

methods like initializeGame(), makeMove(), endGame() etc. Each

of these methods can be handled in subclasses in an independent

manner.

We can use same algorithm for Chess game with same set of

abstract methods. The subclass for Chess game can provide the

concrete implementation of methods like initializeGame(),

makeMove(), endGame() etc.

Template Method pattern is very useful in providing customizable

class to users. We can create the core class with a high level

implementation. And our users can customize our core class in their

custom subclasses.

https://www.digitalocean.com/community/tutorials/template-method-design-pattern-in-java