Obama used this technique during his campaign but not sure of the effect, a lot of money was spent on the business intelligence adaptation to Electioneering .... must be some truth in it.
Does it give you the complete picture ?
Can it be used to manipulate ?
It is very interesting that the democrats in the US claim the Russians influenced social media so this is kind of an admission they also do the same if you ask me.
Truth .... who really knows .... the democrats got it wrong big time.
Was social media manipulated and if so was it significant ?
The only truth I know is billions is spent on social media by commercial organisations and political parties, often politics can be a game of 1 percenters ..... it would for be at least a small part of the picture .... might be over stated .... proof its a tool of the democrats who did not see the Trump wreck coming :-)