Screenflow is an app on the Apple computers that can record what you are doing on your screen, you can record your voice, and you can also record your self. After you record what you did on your screen then you can edit it to make it look better than what it is, and you can put titles on it anywhere you want, you can add call outs so you can make like a spotlight around the cursor to point out important things. You can also add in transitions, you can split the clips if you want to put something in between the two clips, and you can add music into the beginning and or the end.
Screenflow can be useful in the future because you can use it in college for a project that you want to record your voice and what you want to do on your screen for a better way to explain to yourself what your doing and how your supposed to do it. It can also be helpful in your job by if you become a teacher you can make a screenflow to show your students if you're not going to be there the next day. You can also use it if you become a doctor, a vet, or anything really because if you want to be able to show your patients what will happen before you operate on them or operate on their animal, so they can see if it's going to be dangerous to them or not. It can be useful to a construction worker by being able to watch it if you need to remember how to build or take down something.