Captions can be easily added to each slide item by inserting a div element with the .carousel-caption class. This element will hold two different elements: a heading and paragraph element. You have the liberty to use either one of them or both. Take the following code as an example:

<div class="item">
  <img src="images/book1.jpg" alt="Book 1">
    <div class="carousel-caption">
    <h3>This is the first slideshow</h3>
    <p>Lorem ipsum donor.</p>
  </div>
</div>