You are being categorised every time you read any news or watch any video. Spent 1 minute extra in one of those faking articles website, you are being categorised as a person who likes articles from that more and will see those ads only on facebook or in your Google News suggestions against other productive ones you could have seen. Spent watching 2 episodes of a Crime coverage, youtube will categorise you as one who likes crime serials and will start experimenting by showing you more of such content in finding how much you are interested.
It’s very easy to be part of what I call “machine fed habits” where machines will feed you to an infinite loop of suggesting articles around an article you read. The worst thing is the average majority of people read articles that are most likely not going to be productive, helpful in your field or learning based but more around entertainment or gossips. You will be fed to a majority liked articles loop. It might already be happening to you and you might not have noticed.
Be very conscious of next article you are going to open or next video you are going to watch since there is a high probability you are going to consume similar content a lot in your coming days or years since software categorises you as a person who likes that content and starts experimenting with you showing similar content.
You know the outcome.. it will make you that person.