After you have added your slides, it is time to insert your text.
Usually, the First slide contains a Title and a Subtitle which is located below the Title. When you add your second slide, it usually is a Title and Content slide, unless you want a different one, in which you can choose from the Layer Tab, located on the Ribbon.
Adding Text to Slide
If you wish to add text to your slide, simply click on the label that says “Click to Add Text” and write your desired text.
You can also choose different themes from the Layout tab:
Remember not to put too much word into your Slide for the viewers would be uninterested. However, if really needed, then go ahead and write, write, write. You can also add more Slides for more texts.
Adding Image to Your Slide
If your PowerPoint Presentation consists only of texts, it might not pique the interest of your viewers. It is a good thing that you can add image to your slides. It gives you the chance to be as creative as you can and impress your viewers with your creative and unique presentation.
Here are some ways on how you can add image to your slide:
1. If your slide is a Title and Content slide, click the image icon on your slide and choose the picture you wish to place on your Presentation. Note that when your slide is a Title and Content, your image will be placed on the whole content box. 
It will look somethting like this:
2. Click the Layout tab on the Ribbon and select the “Picture with Caption” option. This layout is best for images in which you would like to put captions. It provides you with a space to put the title of your image and a brief description about it.
It will look something like this:
3. Click the Layout tab on the Ribbon and select the “Content with Caption” option. This layout is best for images with long caption in it. 
It will look something like this: