Mr. Dale Sunderland:

There is a very important right of access under Article 15 of the GDPR. People have the right to access information that any organisation holds about them. There are some exceptions to this right - there are always some grey areas - but a number of the larger platforms are now starting to provide better user interfaces to allow users to examine these matters, to make their choice in the first place as to what data they want collected in respect of their activity on these platforms, and to make decisions as to whether they want advertising targeted at them.