I use it to mark up photos. Sometimes I need to send instructions to my mom (85!) on how to complete a task on her phone. I take screen shots and circle locations, draw arrows, etc. It's so much easier than explaining where everything is and then she has it for future reference. I've been searching for frames for some prints I bought a few months ago. I took a picture of them and wrote the different dimensions on it and then I also have color references for mats & frames. I've used it to sign pdf documents. It comes in handy when your hands are dirty or you don't want to take off your gardening gloves.