You can get more traffic from Google just by using images. If you treat your images right, they can appear on Google Image Search.
There are a few things you can do to improve the indexing of your images.

• Use descriptive file names for your images.Name your pictures “picture_name.jpg” not “photo1234.jpg”. This helps Google to know what the image is about.
• Use the alt attribute on your images.
  The alt attribute is what determines the text that shows up when you hover your mouse over an image.Here is an example:

<img src="path_to_image" alt="description" width="100" height="100" />

The alt=”description” is the alt attribute. (It is sometimes called the “alt tag”.)

Be careful to make this descriptive and not too long. For blind readers, this is what gets read to them in place of the image. For people with images turned off, this is the text that they will see instead.

• Use captions or descriptive text near the image.
  Google also uses the text it finds near the image to help figure out what the image is about.