Any images that you put on your website can be indexed by Google, shared on Social Media and snagged and downloaded by people looking for images. Now, we hope that people are not indiscriminately stealing images from your website, but we actually hope that people are finding your site through Google image search or through Pinterest and other social media.
The trouble with the ubiquitous sharing of images is that often the images don’t link back to the originator’s website and if they are not watermarked in any way, there is no way for someone to find their way back to your site.
There are different types of watermarks. The one above is the simplest. This type can easily be created in a program like Picasa. When you export an image, you get the option to put a watermark on the image.
Most photo editing programs will have some capacity for adding watermarks to images. In addition to Picasa, I also use PhotoShop Elements. Click here for the the help article for creating watermarks using PSE.
Transparent watermarks in the center of the image is the best way to make sure that people are not re-using your images for their own purposes. A lower right hand watermark (the only kind Picasa offers) is easier for people to crop out, but it serves the purpose of letting people know where the image came from. So, if the image was posted on Pinterest or other social media, at least people will be able to easily find their way to your website.