How does Google's 'right to be forgotten' work? Actual question, not rhetorical trope :) #R2BF

Possibly this will be solved by 'reading more around the topic' but I've not spotted the answer yet and someone must know.

How does Google's "right to be forgotten" info removal service actually work?

If there is a web page that says stuff you don't like do you ask Google to
(a) stop indexing that page / those pages in the searches (ie provide Google with a list of pages for it to hide)
(b) not show in its search results any pages that mention specific keywords
or
(c) some other method

If (a) then presumably this can easily be thwarted by reposting the content onto a new page with a new address.

Also Google indexes most things on Twitter (admittedly transiently) so if someone was determined they could keep posting stuff there and it would show up in Google (as well as, obviously, on Twitter).

I can see (b) being mildly more successful but Google would have to throttle at the level of search, to prevent each new page with those words showing up. This seems like a lot of hard work.

Also, aren't there sites that monitor the requests made (similar to the ChillingEffects.org site that monitors requests for material under copyright to be removed). They've written on the right to be forgotten but I've not spotted the method Google's using.

If there are, don't bother looking in Google, just go to the relevant site and search there. Eg a Telegraph article I read this morning on R2BF suggests that Google has removed some of the Telegraph's links (suggesting method [a]...) on its search results about someone after they requested it, but searching on the Telegraph's site for the person mentioned in the article brings up other information, whether or not it's indexed on Google.

I'm sure the ethics, privacy, free speech aspects of this are all very interesting but what I'm actually intrigued by is just the practicalities.