I looked first into this plugin as I needed to match my IPTC data from images to the taxonomies and way of handing of metadata of WP and WOO. I was first scared because it is quite intimidating for someone like me that is not tech-savvy but with the help of the author I could understand quickly how this matching works.
Once it is set you can search inside your Media of WP anything you had in your IPTC in Lightroom or other Dam pieces of software.
I would say this is crucial for any photographer that wants to find his/her images t quickly and not be limited to title and caption.
Just an amazing plugin. Thank you David for creating it and being so supportive to us that are a little illiterate in the WP world .