As soon as you open PowerPoint window, by default a slide appears. The slide has by default two placeholders or text boxes. Additional text boxes can also be added using the Insert tab.
To start creating your presentation, just click on the placeholder or text box a blinking cursor will appear. Then type the required title and click outside the box. The text box will now disappear.
See the image.
In a very similar way, add a new text or subtitle to the other text box.
See the image:
Click outside the text box and the slide will look just like the image given below: