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What anyone can learn about you in ten minutes of searching.
Your digital footprint is everything that exists about you online: profiles, photos, comments, directories, mentions, data resold by brokers. Taken separately, each item looks harmless. Cross-referenced (that's OSINT, open-source intelligence), they reveal your address, your schedule, your circle, your habits.
The problem isn't existing online, it's not knowing what's visible. This theme teaches you to map your exposure, then methodically reduce what doesn't need to be public: profiles, privacy settings, data held by brokers. To learn the investigation techniques that reveal that exposure, the "investigate yourself" theme is its offensive counterpart.
Learn where to start to discover what the web already knows about you.
Search yourself regularly under your different identifiers: that's the starting point.
10 exercises per level, mixing decision, spotting and quiz. The first 2 levels are free; the next ones open with the Pro or Elite subscription.
Each level ends with a mission: what remains to be done once the lesson is understood. Some rely on your report, others on a setting we cannot see: it says so each time.
Your address and your date of birth have no business being public. Look at what your scan finds about you: that's your to-do list for the next levels, most serious first.
Pick an account you no longer use and actually delete it, rather than just deactivating it. If the service has no button for that, send it an erasure request citing Article 17 of the GDPR.
In your phone's permissions, remove location access from the camera app. Take a photo and open its details: the place should no longer appear. Older photos keep theirs, so strip it before you share them.
Pick an account you want kept apart from your name, on a forum or in a game. If it has the same photo or handle as your main accounts, change them. It's the cross-matching that identifies you, rarely a single detail.
Send an access request (Article 15 of the GDPR) to a directory or data broker that shows a listing about you. It must tell you, free of charge and within a month, what it holds and where it got it. Don't give it anything it doesn't already have.