Have you ever ordered something online and had to go with a reference number to the counter of a shop and pick up your order?
When you’re in the queue, you might have a look at your phone and see adverts for the very thing you’ve just purchased!
That’s because websites can keep a log of what you’ve looked at.
If you’ve researched, say, different toasters on different websites, computer programmes called cookies can make clever calculations and target you.
If you were uploading info from your fitness tracker, shops might be able to figure out some better products to sell you.
You might even see the advertisements shops change as you walk past!
When you collected your order, the lady at the till might ask if you want to give your name, telephone number and email address over.
Sharing information might sound like a cool thing but it’s important to be in charge of what we share and with whom.
MOBILE: Technology & Engineering for Kids
The tech podcast taking a look at the engineering behind the gadgets we use everyday!
