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unless you have explicitly told them in WMT not to
They go by name of parameter
If it's "for tracking purposes" or anything similar like a sessionID, it is a very very good idea to tell search engines to ignore it
If I tell SEs to ignore the URL, how do I track visits to that particular campaign?
But in my URL there is no specific names but only number like 700000FBR, so do they get it from the URL? My concern is if the URL completely indexed in the SEARCH INDEX?