An actual image address might look like:
< img src=http://mochatoo.smugmug.com/Nature/Potpourri-1/i-ZqD2dsL/0/S/img_6629-L.jpg>
all after the // refers to a specific address on the web where one places photos. So you need such a place for image storage. I use smugmug (fee/not free), another is Flickr. There are numerous - maybe you already have such a place. And don't leave any undesired spaces, eg, < img src= above, already has an error (space between "<" and "img") - if I correct the error by removing the space, there will be the image and not the information for the web location (and you would not get to see what's behind 'the scenes').
The image (after deleting the space):