They can do a lot of analysis with data. In the US, they have started trawling through people's "big data". They are then able to work out how people vote and then target floating voters directly with campaigning and direct calling.
That's not to far away from the state being able to find out how you voted in an election...
I think they will record every web page request. Once they know the page it is quite simple to look up the content. They are also working on a system to correlate data in order to resolve shared internet access to an individual. That mean building a database of citizen data.
http://www.theregister.co.uk/2015/11/04/ukgov_request_filter_in_snooping_bill/