Personal data is a goldmine for advertisers over the Internet, so advertising companies prepare databases that categorize users needs and purchasing desires, and it is often collected without the user’s consent and processing and sending them to other advertising sites. There is no doubt that electronic minds can collect the largest possible amount of personal information and data that a person provides for one reason or another, and they can keep them indefinitely so that they prevent the element of time from being forgotten, and they also have the tremendous power that enables them From mixing information, organizing and arranging it so that in the end it gives an integrated picture of the person that is almost closer to the truth, and this facilitates penetration of the personal pages of the user as well as his e-mail. This constitutes a new source of danger to private life. Which is used in advertising, as knowing the user’s behavior across the network ultimately determines what he likes? What does he hate? And what exactly does he want? Thus, it is easier for advertising sites to target ads that suit him specifically. And access to the page it manages, all of which is a threat to the privacy of users online.