Its brands and advertisers take advantage of advertising banners, print content and TV power to target their customers. Before the internet and the emergence of social media marketing and advertisements have been flawed because the customers are known for traditional the research methods were very short and long. This process can be more transparent. This is when online advertising is running and an industry that was worth billions became extinct. It uses the survey and questionnaire to be ideal.
Source - https://cointelegraph.com/news/restoring-data-back-to-its-owners-with-blockchain
I find it interesting
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i love your post @bijoy123
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