Before shopping online with a new seller, read customer reviews to see if other consumers have had positive or negative experiences, especially when it looks too good to be true.
Advertisers have access to your behaviour and can try to sell your information to businesses around the world. This is nothing new, but has recently been more in the news because of the Facebook scandal.
If you want to have fun with these social media advertise is to go to travel sites just so you can see pics of pretty beaches on your news-feeds. 😛