A letter from the Data and Marketing Association and the Network Advertising Initiative says that the digital advertising community is very concerned because site blocking is very 'bad for customer choice'. Blocking cookies in this way will destroy the relationship between businesses and customers, making advertising time consuming and not useful anymore.
In response, Apple said customers 'had privacy'. 'Tracking technology has intervened too deeply when the advertising company can view customers' browsing history. Information collected does not need to be authorized and used to guide advertising, making them follow users everywhere. Intelligent Tracking Prevention will detect and remove cookies and other data for cross-site tracking, enabling users to browse the web privately. '
To enable / disable this feature on iOS 11, go to Settings > Safari > Prevent Cross-Site Tracking. On macOS High Sierra, go to Preferences on Safari > Privacy > Prevent Cross-Site Tracking.
Not only that, Google also announced it would block ads on Chrome - the browser accounted for 55% of market share according to Statcounter data. They tested this feature from 6/2017 and will release it in February. However, Google says Chrome only blocks annoying ads such as automatically playing audio, video .
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