It uses a dummy int value that you attach a seed to to enure that it will continue to pull new images from your directory even if the seed is fixed. In order to do this right click the node and turn the run trigger into an input and connect a seed generator of your choice set to random.

interesting uses for this

-loading up a directory and letting it cycle through all your images in order

-connecting this node to something like IPAdapter, while being set to random, allowing you to cycle through styles via images

-batch processing of any kind on large amounts of images

Image Captioning saver: - takes an input image (single or batch) and saves a matching .txt file with the image with desired captioning.

Both files will be over written for continuous experimentation. Required to have an output attached for monitoring. Will overwrite images and text on each run. Built this node to save Lora captions from my Dataset Creator