A digital footprint is everything that exists about a person in the digital world.

Every day, whether you intend to or not, you are leaving behind a trail of data that puts together a picture of who you are online: what you are doing, where you are going, and why you are doing all these things. This picture is likely more public than you realise. For students, the situation could be worse. Many grow up with digital footprints that begin before they own digital devices themselves, often created by parents or other well-meaning relatives who post about them online.

Why do digital footprints matter?

Once information is online, it can be difficult (or impossible) to remove
A person's digital footprints determine their digital reputation, which can be just as important as their offline reputation
Words and photos can be easily misinterpreted and altered, causing unintentional harm or offence
Content intended for a private group can easily spread beyond its original circle, hurting relationships and friendships

What are examples of digital footprints?

Search history
Text messages, including deleted messages
Photos and videos, including deleted ones
Tagged photos
Likes/loves on sites like Facebook and Instagram
Browsing history, even when using ‘Incognito’ mode
Locations
Shared links

What should my students learn?

What do advertisers know and why?

Ask your students to come up with a list of things that they do online, e.g., posting photos, texting friends. Write the top five things on the board.
Divide the class into five groups. Ask each group to think about what types of information a company collects when they do that activity. For example, posting a photo allows a company to collect the photo itself, the location of the photo if GPS tracking is on, and liking habits of people who then ‘like’ the photo.
Explain to them that digital footprints allow companies to tailor content to someone’s likes and dislikes. It helps advertisers track what people are most likely to respond to and what they will most likely buy.

What do advertisers do with your information?

Ask your students to come up with instances where online advertisements seemed targeted for them, e.g., YouTube advertisement for a KFC meal when they ate there with their friends a week before or for a holiday somewhere their family went during Christmas.
Ask them to think about the pros and cons of companies having their profile. The pros should include:

Getting more relevant ads
Access to free targeted ad service
Enjoying a useful tool with little hassle
Helping the app/service improve through user data

The cons should include:

Not fully understanding what you are agreeing to
Unclear or confusing Terms and Conditions/Privacy Policy
Not being shown the same content or getting the same prices as your friends
Giving up more personal information than you are comfortable with

Ask them how they think they can better protect their information. Direct them to answers that include:

Turning off location tracking services and do not geo-tag photos
Using the browser’s incognito mode
Reading the Terms and Conditions/Privacy Policy before agreeing

How can you leave less or better digital footprints?

Ask your students how they can try to leave less digital footprints. Guide them to answer with:

Post less: try not to post as frequently
Make sure people who can see their posts are people they know and trust
Think before you post: respect one another and make sure not to leave unkind or cruel posts
Use more privacy-friendly apps: such as Signal or Telegram

Divide the class into groups of 4-5. Ask each group to discuss the limits of a method.
Ask each group to propose additional ways they could leave less or better digital footprints.
Share the answers with the class.

If you happen to also be a parent, you can learn to Guide Your Child In Leaving Better Digital Footprints and Help Your Child Leave Less and Better Digital Footprints.

Useful links

Guide Your Child In Leaving Better Digital Footprints

Help Your Child Leave Less and Better Digital Footprints

The Digital Footprint: Your Child’s Public Resume

Educators: Lessons on Digital Footprints

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