Recently I've come accross multiple ads on facebook and even google with fake websites of exchanges. There is an easy way of knowing that the website you are on is a scam:
Make sure to check the URL
Often, the letters will look quite the same as the real website with minors differences that make all the difference. The most recent one I found was an ad on google when I researched Bittrex. It was written "Bîttrex.com" with the same descriptions as the real website. The î is what made all the difference. Once you enter to this website and connect to it, you will most likely lose all the funds on the exchange.
I suggest you to always enter a crypto website by doing one of those two only:
Always enter directly the URL instead of making a research in google OR
**Go on the right website and make a link it to your "favourite" bar on your internet browser