It's actually both: they handed one-time fine for past behaviour (about 200 M€, not final, can and most likely will be appealed and paid in like 10 years or so; cf. Apple tax breaks in Ireland); and threatening more fines if they don't play along in the future. One of the kinds of punishment that Commision can slap (subject to court oversight, ofc) is „daily fines”, which is a fine that accumulates with constant daily rate up to the date the company complies, or some pre-set maximum, which usually calculates to several months, and need to be reissued afterwards (which is an opportunity to double the daily amount, and again, can be appealed to a court).