If there is no suitable tag for you in one of the different tracking categories, you can create your own one. To do this, first, move the slider on the scale to the right (1.) and then select "Add/edit custom tag" (2). Then you can name your own tag. Don't forget to save the changes by pressing the return button on your keyboard.
If you want to delete your individual "tag", you can do it by clicking on "Add/edit custom tag" and then on "Edit" in the upper right corner.