It is necessary to understand how .bind(), .call() and .apply() method works before finding the use cases to apply these methods. As we know, functions in JS are special type of objects and it contains .bind(), .call() and .apply() methods by default, serving special purpose. Let me explain it through an example

.bind() method

  var user = {
    firstname: "Jack",
    lastname: "Reacher",
    getFullName: function() {
      //because 'this' object is used inside first level method of an object, it points to  user object
      return this.firstname + " " + this.lastname;
    }
  }
  
  //function to print name of the user
  var printName = function() {
    //in this case 'this' object will point to global Window object
    console.log("Hi, I am ", this.getFullName());
  }
  
  printName();//shows an error Uncaught TypeError: this.getFullName is not a function

Trying to invoke printName() prompts an error because this object points to gobal Window object which does not have function getFullName(). In this situation, what if we can control this object to point to user object? JS allows us to control this object inside printName() method using .bind() method.

  var user = {
    firstname: "Jack",
    lastname: "Reacher",
    getFullName: function() {
      //because 'this' object is used inside first level method of an object, it points to  user object
      return this.firstname + " " + this.lastname;
    }
  }
  
  //function to print name of the user
  var printName = function() {
    //in this case 'this' object will point to global Window object
    console.log("Hi, I am ", this.getFullName());
  }
  
  //.bind(user) does not invoke a function rather it returns a copy of printName method passing user object
  var bindedPrintName = printName.bind(user);
  bindedPrintName();//prints Hi, I am  Jack Reacher

It is useful when we want to burrow functions from other object. Let’s say we have a new object user2 without getFullName() method. In this case we can burrow the function of user object to get the result.

  var user = {
    firstname: "Jack",
    lastname: "Reacher",
    getFullName: function() {
      //because 'this' object is used inside first level method of an object, it points to  user object
      return this.firstname + " " + this.lastname;
    }
  }
  
  var user2 = {
    firstname: "William",
    lastname: "Smith"
  }
  
  //.bind(user) does not invoke a function rather it returns a copy of getFullName method passing user2 object
  var bindedPrintName = user.getFullName.bind(user2);
  bindedPrintName();//prints William Smith

Similarly, we can use .bind() method for function currying, which means copying a function with some preset parameters.

  function multiply(x, y) {
    return x * y;
  }
  
  //do not foucs on `this` object in this case, it points to normal global Window object.
  //bind in this case accepts this object and first parameter value i.e x = 10
  var multiplyByTen = multiply.bind(this, 10);
  
   //bind in this case accepts this object and first parameter value i.e x = 6
  var multiplyBySix = multiply.bind(this, 6);
  
  console.log(multiplyByTen(2)); //prints 20
  console.log(multiplyBySix(5)); //prints 30

.call() method

.call() method actually invokes the function.

    var user = {
    firstname: "Jack",
    lastname: "Reacher",
    getFullName: function() {
      //because 'this' object is used inside first level method of an object, it points to  user object
      return this.firstname + " " + this.lastname;
    }
  }
  
  //function to print name of the user
  var printName = function(address, age) {
    //in this case 'this' object will point to global Window object
    console.log("Hi, I am ", this.getFullName() + " from " + address + ". Age: " + age + " years old.");
  }
  
  printName.call(user, "Pandora planet", 100);//prints Hi, I am  Jack Reacher from Pandora planet. Age: 100 years old.

.apply() method

.apply() invokes the method with the supplied parameters but it differs slightly from .call() method. .apply() method accepts arguments in the form of array as shown below

   printName.apply(user, ["Pandora planet", 100]);//prints Hi, I am  Jack Reacher from Pandora planet. Age: 100 years old.

It is useful while evaluating mathematical expressions.