Naming Photos ?

How can I name or label each photo transferred from my desktop to my ipad? I use the photos to show clients our products. Each product has codes attributed to them when on my desktop, once transferred they do not appear on my IPAD. Without the product codes the photos are only so useful as a reference..It would be handy and a time saver to see the same description attached to the photos on the desktop come across and be visible too. Is there any simple solution within the APP.. ? Or am I missing something.. Thanks in advance . Corey