How to Optimize Images for Better Search Engine Rankings ? ?......?

Best thing is to use alt tag in images.

Put Alt tags and title tags on images.

Always use Alt tags and title tags on images.

Yes, you got your answers = alt & title. Later use Pinterest and WeHeartIt and similar social places to use them for traffic.

Alt tages & title tags are very important to optimise your images. I also use Pinerest which drives a ton of traffic to my websites

Always use Alt tags and title tags on images.

Put Alt tags and title tags on images.

All is good first of all image don't copy another site and image should be unique and most impotent thing my title and description must represent image. thank you

No and no. The very first thing you do with an image is to optimize the image itself before you upload the image to the server. Optimizing web images and photos will give faster loading times. Google Free Image Optimizer to use your site of choice. (e.g.) http://www.imageoptimizer.net

Before you upload an image to your server, the first thing to do is rename that image to a descriptive name that includes keywords you want the image to rank for.

Put Alt tags and title tags on images. Apart from that you can share your images on image sharing websites.