Large technological internet companies, including those that run social media portals, do. They collect and collect large amounts of data about Internet users. They collect data about the users of their portals for marketing purposes, for the purpose of targeting Internet users, to whom they are directed by profiled information displayed on banners.

Large technological Internet companies that gather in their Big Data database systems various information about Internet users on the basis of those collected from various websites, entered by users of social media sites entries, comments, placed banners, searched information build avatars that are equivalent to every user offered on the Internet information services. Often, Internet users notice that after they searched the Internet for information on a specific topic, right after this search on various websites they use, advertisements or products related to what they just searched on the Internet have been displayed on advertising banners. This is an example of the use of collected information in the Big Data database systems on the subject of users of individual websites and web portals via the Internet technology company.

Internet users are usually unaware of how much information their avatar contains. Often internet users are not fully aware of how much information is available about them in Big Data database systems run by the largest online technology companies. on the basis of information collected from various websites and portals about Internet users in Big Data database systems operated by these online technology companies, electronic equivalents of individuals are built in the form of so-called avatars. on the basis of this information, result reports are created in the Big Data database systems of online technology companies, which are sold to other companies interested in a specific target group of clients, to which they direct their offer of products or services.

Large technological Internet companies gather in their Big Data database systems various information about Internet users, even the types of information they currently do not need. According to the researchers of this issue, these companies collect and collect information about Internt users "on stock", ie they do not need them at present, but perhaps they will use this information only for 5 years, when the progress of data processing technology will change the information needs of these companies in the scope of data processing and its use for the needs of advertising campaigns and marketing services offered to users.

Many data show that the largest internet technology companies that run social media portals, search engines, cloud computing information services, instant messaging and other Internet information services gather in their Big Data database systems various information about Internet users using individual information, communication and marketing internet services.

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In the context of the above issues, the following question is valid:

How big collections of information about Internet users gather online technology companies in Big Data database systems?

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