Also be careful if you log into YouTube. I have a smart tv that I keep logged onto my youtube account so we can watch a playlist or subscriptions to certain channels. If i am logged onto that account on my smart phone or ipad, the viewing history can be seen on all devices logged on, plus they start suggesting other videos based on the history. It scared the mess out of me one day when a suggestion for an "apostate" YouTube video popped up on my 60" screen tv in the living room..I quickly switched over to Netflix. Lol...
So, now I don't click on "apostate" youtube videos from JWN links or anywhere else unless I am logged out of YouTube on that device...I haven't figured out how to delete the YouTube history yet.