It depends on if your question is why it is free to use or if it is free to submit content. It is free to use because of that a high amount of the Internets traffic does not like to pay money for...
If you are asking gmail,, go to gmail, click on the image you currently have. Then copy the URL of the image you want from Google images, select "URL", then paste the URL. You are done! ~Hope this...
Right click on the image as "Save Picture As". Then save to your flashdrive or thumbdrive. Next go to your account and upload it from your thumbdrive or flashdrive.
Google is a search engine. It should automatically search for the pictures you want, as far as i know. Make sure they have got an Alt tag to improve rankings.
If you want to save a picture you have found using your web browser and the Google search engine you can do as follows (on a Windows computer and other operating systems are quite similar) Locate the...