A digital tattoo (also called a digital footprint) is all your online activity, action and contribution aka. everything you search for, everything you click on and everything you upload online.  It's called a tattoo specifically as it stays there forever just like a real life tattoo.  Your digital tattoo is created as soon as you start your online search therefore even without knowing, you always leave a trail behind (a footprint.)  Things like your social media posts or comments, your Skype calls, email records and app use can easily be seen and potentially even traced therefore it's important that you're being smart about what you're doing online.  Below you'll find a video on digital tattoos to help you understand them more.