In Photosnack, you can name your photos or you can describe them, in order to let people know more about them. You can even add a link to your images.
The first step is to be sure that you are logged into your account. Now, you just need to hover your mouse over the desired slideshow and click on the "edit" button.
After you have done this, just scroll down a little bit until you see the "my photos" section and click on the "edit photo" button that is on the right side of the "my photos" text.
Now you will see the option to add a name for the image, a description, and even a link!
After you have finished adding all the desired pieces of information to your image, just click the "done" button, the "next" button.
The final step is to click on the green "publish" button and you are done!
Here is a short video tutorial of all of the steps from above: