It’s retargeting and it happens much more often than you think. Try the same thing at pretty much any e-commerce store. Works best if you checkout as a guest

It’s retargeting and it happens much more often than you think. Try the same thing at pretty much any e-commerce store. Works best if you checkout as a guest (using only your email) and get all the way up to payment. A day later you’ll typically get a discount coupon and an invitation to finish checking out.