I recently went on holiday, and ever since looking up the destination, researching it and booking it through their website, and a large proportion of adverts I seem to find on any website (including mumsnet) has been an advert for where I just went on holiday!
On getting back I started hypothetically researching what a holiday to another destination would cost. Now all the adverts that pop up are for this other destination! Just a coincidence, or is the internet actually spying on me?